diff --git a/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt b/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt
index c4383cb3df5..fa05d37c462 100644
--- a/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt
+++ b/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanCompileTask.kt
@@ -184,7 +184,7 @@ open class KonanCompileConfig(
 
     // DSL. Input/output files
 
-    fun inputDir(dir: String) = with(compilationTask) {
+    fun inputDir(dir: Any) = with(compilationTask) {
         _inputFiles.add(project.fileTree(dir))
     }
     fun inputFiles(vararg files: Any) = with(compilationTask) {
diff --git a/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanInteropTask.kt b/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanInteropTask.kt
index ae9b30da228..35367028e5a 100644
--- a/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanInteropTask.kt
+++ b/tools/kotlin-native-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KonanInteropTask.kt
@@ -173,9 +173,8 @@ open class KonanInteropConfig(
         headers.add(files)
     }
 
-
-    fun includeDirs(vararg values: String) = with(interopProcessingTask) {
-        compilerOpts.addAll(values.map { "-I$it" })
+    fun includeDirs(vararg values: Any) = with(interopProcessingTask) {
+        compilerOpts.addAll(values.map { "-I${project.file(it).canonicalPath}" })
     }
 
     fun linkerOpts(vararg values: String) = linkerOpts(values.toList())