diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/SecondaryCtorLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/SecondaryCtorLowering.kt
index b4cae0aa581..2a8ae6d84a9 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/SecondaryCtorLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/SecondaryCtorLowering.kt
@@ -179,6 +179,8 @@ private fun JsIrBackendContext.buildInitDeclaration(constructor: IrConstructor,
     val functionName = "${constructorName}_\$Init\$"
 
     return irFactory.buildFun {
+        startOffset = constructor.startOffset
+        endOffset = constructor.endOffset
         name = Name.identifier(functionName)
         returnType = type
         visibility = DescriptorVisibilities.INTERNAL
@@ -201,6 +203,8 @@ private fun JsIrBackendContext.buildFactoryDeclaration(constructor: IrConstructo
     val functionName = "${constructorName}_\$Create\$"
 
     return irFactory.buildFun {
+        startOffset = constructor.startOffset
+        endOffset = constructor.endOffset
         name = Name.identifier(functionName)
         returnType = type
         visibility = constructor.visibility
diff --git a/compiler/testData/debug/stepping/constructors.kt b/compiler/testData/debug/stepping/constructors.kt
index f7ffb34a8b3..b0fa4ac4f05 100644
--- a/compiler/testData/debug/stepping/constructors.kt
+++ b/compiler/testData/debug/stepping/constructors.kt
@@ -219,12 +219,12 @@ class O<T>(i: T) {
 // test.kt:49 L_init_$Init$
 // test.kt:13 box
 // test.kt:57 M_init_$Init$
-// test.kt:61 M_init_$Init$_0
+// test.kt:61 M_init_$Init$
 // test.kt:56 M
 // test.kt:58 M_init_$Init$
 // test.kt:14 box
 // test.kt:65 N_init_$Init$
-// test.kt:69 N_init_$Init$_0
+// test.kt:69 N_init_$Init$
 // test.kt:64 N
 // test.kt:66 N_init_$Init$
 // test.kt:15 box
@@ -232,4 +232,4 @@ class O<T>(i: T) {
 // test.kt:16 box
 // test.kt:73 O_init_$Init$
 // test.kt:72 <init>
-// test.kt:17 box
\ No newline at end of file
+// test.kt:17 box
diff --git a/js/js.translator/testData/lineNumbers/syntheticCodeInConstructors.kt b/js/js.translator/testData/lineNumbers/syntheticCodeInConstructors.kt
index be73c86e334..cae9320f58d 100644
--- a/js/js.translator/testData/lineNumbers/syntheticCodeInConstructors.kt
+++ b/js/js.translator/testData/lineNumbers/syntheticCodeInConstructors.kt
@@ -25,5 +25,5 @@ class C : A {
             )
 }
 
-// LINES(JS):    1 1   3 * 1 1 1 1 1 1 7 * 9   10 11 * 15 15 16 17 14    19 15 15 22 22 23 24         22 22
-// LINES(JS_IR): 1 1 * 3 *             7 7 9 9 10 11         16 17    15 19 *           23 24 23 * 14
+// LINES(JS):    1 1   3 * 1 1 1 1 1 1 7 * 9   10 11 * 15 15 16 17 14    19 15 15   22 22 23 24      22 22
+// LINES(JS_IR): 1 1 * 3 *             7 7 9 9 10 11   15    16 17    15 19 *  15 * 22    23 24 23 * 22 *  14