diff -r 1343c01b29d5 -r 8584c5b96cb6 src/hotspot/share/jfr/jni/jfrJniMethod.cpp
--- a/src/hotspot/share/jfr/jni/jfrJniMethod.cpp	Mon Sep 16 11:18:50 2019 +0200
+++ b/src/hotspot/share/jfr/jni/jfrJniMethod.cpp	Mon Sep 16 12:47:53 2019 +0200
@@ -284,7 +284,7 @@
   return JfrJavaEventWriter::flush(writer, used_size, requested_size, thread);
 JVM_END
 
-JVM_ENTRY_NO_ENV(void, jfr_flush(JNIEnv* env, jobject jvm, jboolean include_metadata, jshort flush_counter))
+JVM_ENTRY_NO_ENV(void, jfr_flush(JNIEnv* env, jobject jvm, jboolean include_metadata))
   JfrRepository::flush(include_metadata == JNI_TRUE, thread);
 JVM_END