diff --git a/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeUtils.kt b/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeUtils.kt
index 10d39259606..846bd3650f4 100644
--- a/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeUtils.kt
+++ b/Interop/Runtime/src/native/kotlin/kotlinx/cinterop/NativeUtils.kt
@@ -31,20 +31,20 @@ external fun bitsToDouble(bits: Long): Double
 
 // TODO: deprecate.
 @TypedIntrinsic(IntrinsicType.INTEROP_SIGN_EXTEND)
-external fun <R : Number> Number.signExtend(): R
+external inline fun <reified R : Number> Number.signExtend(): R
 
 // TODO: deprecate.
 @TypedIntrinsic(IntrinsicType.INTEROP_NARROW)
-external fun <R : Number> Number.narrow(): R
+external inline fun <reified R : Number> Number.narrow(): R
 
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> Byte.convert(): R
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> Short.convert(): R
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> Int.convert(): R
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> Long.convert(): R
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> UByte.convert(): R
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> UShort.convert(): R
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> UInt.convert(): R
-@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external fun <R : Any> ULong.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> Byte.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> Short.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> Int.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> Long.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> UByte.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> UShort.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> UInt.convert(): R
+@TypedIntrinsic(IntrinsicType.INTEROP_CONVERT) external inline fun <reified R : Any> ULong.convert(): R
 
 @Target(AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER, AnnotationTarget.FILE)
 @Retention(AnnotationRetention.SOURCE)
diff --git a/backend.native/tests/build.gradle b/backend.native/tests/build.gradle
index fc56bbe2e6b..5cfbc482ba9 100644
--- a/backend.native/tests/build.gradle
+++ b/backend.native/tests/build.gradle
@@ -3533,6 +3533,10 @@ interopTest("interop_withSpaces") {
     }
 }
 
+task interop_convert(type: KonanLocalTest) {
+    source = "codegen/intrinsics/interop_convert.kt"
+}
+
 /*
 TODO: This test isn't run automatically
 task interop_echo_server(type: RunInteropKonanTest) {
diff --git a/backend.native/tests/codegen/intrinsics/interop_convert.kt b/backend.native/tests/codegen/intrinsics/interop_convert.kt
new file mode 100644
index 00000000000..df1259b761c
--- /dev/null
+++ b/backend.native/tests/codegen/intrinsics/interop_convert.kt
@@ -0,0 +1,20 @@
+package codegen.intrinsics.interop_convert
+
+import kotlin.test.*
+import kotlinx.cinterop.*
+
+fun convertIntToShortOrNull(i: Int, b: Boolean): Short? = if (b) i.convert() else null
+fun narrowIntToShortOrNull(i: Int, b: Boolean): Short? = if (b) i.narrow() else null
+fun signExtendShortToIntOrNull(i: Short, b: Boolean): Int? = if (b) i.signExtend() else null
+
+@Test
+fun testNI() {
+    assertNull(convertIntToShortOrNull(0, false))
+    assertEquals(1, convertIntToShortOrNull(1, true))
+
+    assertNull(narrowIntToShortOrNull(2, false))
+    assertEquals(3, narrowIntToShortOrNull(3, true))
+
+    assertNull(signExtendShortToIntOrNull(4, false))
+    assertEquals(5, signExtendShortToIntOrNull(5, true))
+}
\ No newline at end of file