diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerFirTestdataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerFirTestdataTestGenerated.java
index 212a8a9f660..deb12e952d4 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerFirTestdataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerFirTestdataTestGenerated.java
@@ -3989,6 +3989,12 @@ public class DiagnosisCompilerFirTestdataTestGenerated extends AbstractDiagnosis
                 runTest("compiler/fir/analysis-tests/testData/resolve/visibility/kotlinJavaKotlinHierarchy.kt");
             }
 
+            @Test
+            @TestMetadata("privateAliasInSamePackage.kt")
+            public void testPrivateAliasInSamePackage() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.kt");
+            }
+
             @Test
             @TestMetadata("protectedInCompanion.kt")
             public void testProtectedInCompanion() throws Exception {
diff --git a/compiler/fir/analysis-tests/legacy-fir-tests/tests-gen/org/jetbrains/kotlin/fir/LazyBodyIsNotTouchedTilContractsPhaseTestGenerated.java b/compiler/fir/analysis-tests/legacy-fir-tests/tests-gen/org/jetbrains/kotlin/fir/LazyBodyIsNotTouchedTilContractsPhaseTestGenerated.java
index f121e9d32bc..fce8a5371a8 100644
--- a/compiler/fir/analysis-tests/legacy-fir-tests/tests-gen/org/jetbrains/kotlin/fir/LazyBodyIsNotTouchedTilContractsPhaseTestGenerated.java
+++ b/compiler/fir/analysis-tests/legacy-fir-tests/tests-gen/org/jetbrains/kotlin/fir/LazyBodyIsNotTouchedTilContractsPhaseTestGenerated.java
@@ -3574,6 +3574,11 @@ public class LazyBodyIsNotTouchedTilContractsPhaseTestGenerated extends Abstract
             runTest("compiler/fir/analysis-tests/testData/resolve/visibility/kotlinJavaKotlinHierarchy.kt");
         }
 
+        @TestMetadata("privateAliasInSamePackage.kt")
+        public void testPrivateAliasInSamePackage() throws Exception {
+            runTest("compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.kt");
+        }
+
         @TestMetadata("protectedInCompanion.kt")
         public void testProtectedInCompanion() throws Exception {
             runTest("compiler/fir/analysis-tests/testData/resolve/visibility/protectedInCompanion.kt");
diff --git a/compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.fir.txt b/compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.fir.txt
new file mode 100644
index 00000000000..9f6a4635e78
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.fir.txt
@@ -0,0 +1,26 @@
+FILE: First.kt
+    package first
+
+    private final typealias Key = R|kotlin/String|
+FILE: Third.kt
+    package first
+
+    public open class Base<T> : R|kotlin/Any| {
+        public constructor<T>(): R|first/Base<T>| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final fun get(): R|T?| {
+            ^get Null(null)
+        }
+
+    }
+    public final class Derived : R|first/Base<second/Second.Key>| {
+        public constructor(): R|first/Derived| {
+            super<R|first/Base<second/Second.Key>|>()
+        }
+
+    }
+    public final fun test(d: R|first/Derived|): R|kotlin/Unit| {
+        R|<local>/d|.R|SubstitutionOverride<first/Derived.get: R|second/Second.Key?|>|()?.{ $subj$.R|second/Second.Key.foo|() }
+    }
diff --git a/compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.kt b/compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.kt
new file mode 100644
index 00000000000..ac3e5fe0b58
--- /dev/null
+++ b/compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.kt
@@ -0,0 +1,33 @@
+// ISSUE: KT-49652
+// FILE: First.kt
+package first
+
+private typealias Key = String
+
+// FILE: second/Second.java
+package second
+
+public class Second {
+    public static class Key {
+        public void foo() {}
+    }
+
+    public void bar() {}
+}
+
+// FILE: Third.kt
+package first
+
+import second.Second.*
+import second.Second
+
+open class Base<T> {
+    fun get(): T? = null
+}
+
+// Key is resolved to first.Key. In fact, should be second.Second.Key, because first.Key is private-in-file
+class Derived : Base<Key>()
+
+fun test(d: Derived) {
+    d.get()?.foo()
+}
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticTestGenerated.java
index 5e34ec31c44..43cbe72d3d6 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticTestGenerated.java
@@ -3989,6 +3989,12 @@ public class FirDiagnosticTestGenerated extends AbstractFirDiagnosticTest {
                 runTest("compiler/fir/analysis-tests/testData/resolve/visibility/kotlinJavaKotlinHierarchy.kt");
             }
 
+            @Test
+            @TestMetadata("privateAliasInSamePackage.kt")
+            public void testPrivateAliasInSamePackage() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.kt");
+            }
+
             @Test
             @TestMetadata("protectedInCompanion.kt")
             public void testProtectedInCompanion() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticsWithLightTreeTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticsWithLightTreeTestGenerated.java
index 9b1c43e88a3..0a7c0da773d 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticsWithLightTreeTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirDiagnosticsWithLightTreeTestGenerated.java
@@ -3989,6 +3989,12 @@ public class FirDiagnosticsWithLightTreeTestGenerated extends AbstractFirDiagnos
                 runTest("compiler/fir/analysis-tests/testData/resolve/visibility/kotlinJavaKotlinHierarchy.kt");
             }
 
+            @Test
+            @TestMetadata("privateAliasInSamePackage.kt")
+            public void testPrivateAliasInSamePackage() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolve/visibility/privateAliasInSamePackage.kt");
+            }
+
             @Test
             @TestMetadata("protectedInCompanion.kt")
             public void testProtectedInCompanion() throws Exception {
diff --git a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt
index 7e74549d4cd..fcce7c0a645 100644
--- a/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt
+++ b/compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirSupertypesResolution.kt
@@ -211,7 +211,7 @@ open class FirSupertypeResolverVisitor(
     private val scopeForLocalClass: PersistentList<FirScope>? = null,
     private val localClassesNavigationInfo: LocalClassesNavigationInfo? = null,
     private val firProviderInterceptor: FirProviderInterceptor? = null,
-    private val useSiteFile: FirFile? = null,
+    private var useSiteFile: FirFile? = null,
     containingDeclarations: List<FirDeclaration> = emptyList(),
 ) : FirDefaultVisitor<Unit, Any?>() {
     private val supertypeGenerationExtensions = session.extensionService.supertypeGenerators
@@ -225,6 +225,16 @@ open class FirSupertypeResolverVisitor(
         }
     }
 
+    private inline fun <R> withFile(file: FirFile, block: () -> R): R {
+        val oldFile = useSiteFile
+        try {
+            useSiteFile = file
+            return block()
+        } finally {
+            useSiteFile = oldFile
+        }
+    }
+
     private fun getFirClassifierContainerFileIfAny(symbol: FirClassLikeSymbol<*>): FirFile? =
         if (firProviderInterceptor != null) firProviderInterceptor.getFirClassifierContainerFileIfAny(symbol)
         else session.firProvider.getFirClassifierContainerFileIfAny(symbol.classId)
@@ -454,7 +464,9 @@ open class FirSupertypeResolverVisitor(
     }
 
     override fun visitFile(file: FirFile, data: Any?) {
-        visitDeclarationContent(file, null)
+        withFile(file) {
+            visitDeclarationContent(file, null)
+        }
     }
 }