diff --git a/compiler-rt/lib/profile/GCDAProfiling.c b/compiler-rt/lib/profile/GCDAProfiling.c
index f0c05075a..11b1c4557 100644
--- a/compiler-rt/lib/profile/GCDAProfiling.c
+++ b/compiler-rt/lib/profile/GCDAProfiling.c
@@ -468,6 +468,7 @@ void llvm_gcda_end_file() {
       unmap_file();
     }
 
+    fflush(output_file);
     flock(fd, LOCK_UN);
     fclose(output_file);
     output_file = NULL;