diff -r c8b2a408628b -r 339d2fbe8675 src/hotspot/share/jfr/jni/jfrJniMethod.hpp
--- a/src/hotspot/share/jfr/jni/jfrJniMethod.hpp	Thu Dec 13 14:21:04 2018 +0100
+++ b/src/hotspot/share/jfr/jni/jfrJniMethod.hpp	Thu Dec 13 14:36:54 2018 +0100
@@ -129,6 +129,9 @@
 
 void JNICALL jfr_emit_old_object_samples(JNIEnv* env, jobject jvm, jlong cutoff_ticks, jboolean);
 
+jboolean JNICALL jfr_should_rotate_disk(JNIEnv* env, jobject jvm);
+
+
 #ifdef __cplusplus
 }
 #endif