diff --git a/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArguments.kt b/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArguments.kt
index 3af22ed7f56..23397fb4e09 100644
--- a/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArguments.kt
+++ b/compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2NativeCompilerArguments.kt
@@ -289,7 +289,7 @@ class K2NativeCompilerArguments : CommonCompilerArguments() {
         valueDescription = "<path>",
         description = "Paths to output directories for refined modules (whose expects this module can actualize)"
     )
-    var refinesPaths: String? = null
+    var refinesPaths: Array<String>? = null
 
     @Argument(value = "-Xdebug-info-version", description = "generate debug info of given version (1, 2)")
     var debugInfoFormatVersion: String = "1" /* command line parser doesn't accept kotlin.Int type */
diff --git a/kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2Native.kt b/kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2Native.kt
index b5671f4afca..ad8d240c796 100644
--- a/kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2Native.kt
+++ b/kotlin-native/backend.native/cli.bc/src/org/jetbrains/kotlin/cli/bc/K2Native.kt
@@ -257,7 +257,7 @@ class K2Native : CLICompiler<K2NativeCompilerArguments>() {
                     put(FRIEND_MODULES, arguments.friendModules!!.split(File.pathSeparator).filterNot(String::isEmpty))
 
                 if(arguments.refinesPaths != null)
-                    put(REFINES_MODULES, arguments.refinesPaths!!.split(File.pathSeparator).filterNot(String::isEmpty))
+                    put(REFINES_MODULES, arguments.refinesPaths!!.filterNot(String::isEmpty))
 
                 put(EXPORTED_LIBRARIES, selectExportedLibraries(configuration, arguments, outputKind))
                 put(INCLUDED_LIBRARIES, selectIncludes(configuration, arguments, outputKind))
diff --git a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/KotlinNativeCompilerArgBuilder.kt b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/KotlinNativeCompilerArgBuilder.kt
index 08bdbb16878..f0b0b359e88 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/KotlinNativeCompilerArgBuilder.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/tasks/KotlinNativeCompilerArgBuilder.kt
@@ -67,7 +67,7 @@ internal fun buildKotlinNativeKlibCompilerArgs(
     if (sharedCompilationData != null) {
         val refinesPaths = sharedCompilationData.refinesPaths.files
         if (refinesPaths.isNotEmpty()) {
-            addArg("-Xrefines-paths", refinesPaths.joinToString(File.pathSeparator) { it.absolutePath })
+            addArg("-Xrefines-paths", refinesPaths.joinToString(separator = ",") { it.absolutePath })
         }
     }