diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java
index 334e7f5f200..96c753b4faf 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java
@@ -29880,6 +29880,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
                 }
 
+                @Test
+                @TestMetadata("nonValidFirstChar.kt")
+                public void testNonValidFirstChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonValidFirstChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
index e7846695e3e..d783fc562aa 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
@@ -29880,6 +29880,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
                 }
 
+                @Test
+                @TestMetadata("nonValidFirstChar.kt")
+                public void testNonValidFirstChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonValidFirstChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java
index 348a901b5d8..07a6b6be157 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java
@@ -29880,6 +29880,12 @@ public class FirOldFrontendDiagnosticsWithLightTreeTestGenerated extends Abstrac
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
                 }
 
+                @Test
+                @TestMetadata("nonValidFirstChar.kt")
+                public void testNonValidFirstChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonValidFirstChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {
diff --git a/compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/JavaSyntheticPropertiesScope.kt b/compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/JavaSyntheticPropertiesScope.kt
index 1ab7001f845..1e6f310bbcd 100644
--- a/compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/JavaSyntheticPropertiesScope.kt
+++ b/compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/JavaSyntheticPropertiesScope.kt
@@ -146,17 +146,11 @@ class JavaSyntheticPropertiesScope(
         name: Name,
         ownerClass: ClassDescriptor
     ): SyntheticPropertyHolder {
-        if (name.isSpecial) return SyntheticPropertyHolder.EMPTY
-
-        val identifier = name.identifier
-        if (identifier.isEmpty()) return SyntheticPropertyHolder.EMPTY
-
-        val firstChar = identifier[0]
-        if (!firstChar.isJavaIdentifierStart() || firstChar in 'A'..'Z') return SyntheticPropertyHolder.EMPTY
+        val possibleGetMethodNames = possibleGetMethodNames(name)
+        if (possibleGetMethodNames.isEmpty()) return SyntheticPropertyHolder.EMPTY
 
         val memberScope = ownerClass.unsubstitutedMemberScope
 
-        val possibleGetMethodNames = possibleGetMethodNames(name)
         val getMethod = possibleGetMethodNames
             .flatMap { memberScope.getContributedFunctions(it, NoLookupLocation.FROM_SYNTHETIC_SCOPE) }
             .singleOrNull {
diff --git a/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonValidFirstChar.kt b/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonValidFirstChar.kt
new file mode 100644
index 00000000000..0b16c80bd27
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonValidFirstChar.kt
@@ -0,0 +1,14 @@
+// FIR_IDENTICAL
+// SKIP_TXT
+// FILE: A.java
+public class A {
+    public String get1() {
+        return "";
+    }
+}
+
+// FILE: main.kt
+fun foo(a: A) {
+    a.<!UNRESOLVED_REFERENCE!>`1`<!>
+    a.get1()
+}
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
index 5a9e4507ef5..bc3f16ec7f8 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
@@ -29976,6 +29976,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
                 }
 
+                @Test
+                @TestMetadata("nonValidFirstChar.kt")
+                public void testNonValidFirstChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonValidFirstChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {
diff --git a/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/propertiesConventionUtil.kt b/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/propertiesConventionUtil.kt
index 6d9b595634d..69e6ece6622 100644
--- a/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/propertiesConventionUtil.kt
+++ b/core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/propertiesConventionUtil.kt
@@ -65,8 +65,15 @@ fun getPropertyNamesCandidatesByAccessorName(name: Name): List<Name> {
 }
 
 fun possibleGetMethodNames(propertyName: Name): List<Name> {
-    val result = ArrayList<Name>(3)
+    if (propertyName.isSpecial) return emptyList()
+
     val identifier = propertyName.identifier
+    if (identifier.isEmpty()) return emptyList()
+
+    val firstChar = identifier[0]
+    if (!firstChar.isJavaIdentifierStart() || firstChar in 'A'..'Z') return emptyList()
+
+    val result = ArrayList<Name>(3)
 
     if (JvmAbi.startsWithIsPrefix(identifier)) {
         result.add(propertyName)