diff --git a/memory.cpp b/memory.cpp
index 21f4e6248e..1be5592d0c 100644
--- a/memory.cpp
+++ b/memory.cpp
@@ -845,6 +845,7 @@ HSAKMT_STATUS HSAKMTAPI hsaKmtUnmapMemoryToGPU(void *MemoryAddress) {
     }
   }
 
+  return HSAKMT_STATUS_SUCCESS;
 }
 
 HSAKMT_STATUS HSAKMTAPI hsaKmtMapGraphicHandle(HSAuint32 NodeId,