diff --git a/src/java.base/macosx/native/libjli/java_md_macosx.c b/src/java.base/macosx/native/libjli/java_md_macosx.c
--- a/src/java.base/macosx/native/libjli/java_md_macosx.c
+++ b/src/java.base/macosx/native/libjli/java_md_macosx.c
@@ -1056,7 +1056,7 @@
  * Note the jvmInstance must be initialized first before entering into
  * ShowSplashScreen, as there is a callback into the JLI_GetJavaVMInstance.
  */
-void PostJVMInit(JNIEnv *env, jstring mainClass, JavaVM *vm) {
+void PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm) {
     jvmInstance = vm;
     SetMainClassForAWT(env, mainClass);
     CHECK_EXCEPTION_RETURN();
diff --git a/src/java.base/share/native/libjli/java.h b/src/java.base/share/native/libjli/java.h
--- a/src/java.base/share/native/libjli/java.h
+++ b/src/java.base/share/native/libjli/java.h
@@ -196,7 +196,7 @@
  * For MacOSX and Windows/Unix compatibility we require these
  * entry points, some of them may be stubbed out on Windows/Unixes.
  */
-void     PostJVMInit(JNIEnv *env, jstring mainClass, JavaVM *vm);
+void     PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm);
 void     ShowSplashScreen();
 void     RegisterThread();
 /*
diff --git a/src/java.base/unix/native/libjli/java_md_solinux.c b/src/java.base/unix/native/libjli/java_md_solinux.c
--- a/src/java.base/unix/native/libjli/java_md_solinux.c
+++ b/src/java.base/unix/native/libjli/java_md_solinux.c
@@ -938,7 +938,7 @@
 }
 
 void
-PostJVMInit(JNIEnv *env, jstring mainClass, JavaVM *vm)
+PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm)
 {
     // stubbed out for windows and *nixes.
 }
diff --git a/src/java.base/windows/native/libjli/java_md.c b/src/java.base/windows/native/libjli/java_md.c
--- a/src/java.base/windows/native/libjli/java_md.c
+++ b/src/java.base/windows/native/libjli/java_md.c
@@ -975,7 +975,7 @@
 }
 
 void
-PostJVMInit(JNIEnv *env, jstring mainClass, JavaVM *vm)
+PostJVMInit(JNIEnv *env, jclass mainClass, JavaVM *vm)
 {
     // stubbed out for windows and *nixes.
 }