diff --git a/compiler-rt/lib/profile/InstrProfilingBuffer.c b/compiler-rt/lib/profile/InstrProfilingBuffer.c
index 4f841268757a..295be690e4a2 100644
--- a/compiler-rt/lib/profile/InstrProfilingBuffer.c
+++ b/compiler-rt/lib/profile/InstrProfilingBuffer.c
@@ -55,7 +55,7 @@ static uint32_t bufferWriter(ProfDataIOVec *IOVecs, uint32_t NumIOVecs,
   return 0;
 }
 
-LLVM_LIBRARY_VISIBILITY
+LLVM_LIBRARY_VISIBILITY int
 __llvm_profile_write_buffer(char *Buffer) {
   return llvmWriteProfData(bufferWriter, Buffer, 0, 0);
 }