diff --git a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/AbstractCInteropCommonizerTask.kt b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/AbstractCInteropCommonizerTask.kt
index 3a634e203ad..8100718ec74 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/AbstractCInteropCommonizerTask.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/AbstractCInteropCommonizerTask.kt
@@ -25,7 +25,7 @@ internal abstract class AbstractCInteropCommonizerTask : DefaultTask() {
 }
 
 internal fun AbstractCInteropCommonizerTask.outputDirectory(group: CInteropCommonizerGroup): File {
-    val interopsDirectoryName = group.interops.map { it.interopName }.toSet().joinToString(":")
+    val interopsDirectoryName = group.interops.map { it.interopName }.toSet().joinToString("_")
     val groupDisambiguation = group.targets.joinToString { it.identityString } +
             group.interops.joinToString { it.uniqueName }