diff --git a/python/spdk/sma/proto/sma.proto b/python/spdk/sma/proto/sma.proto
index 6d962bd7b..0d20f0b52 100644
--- a/python/spdk/sma/proto/sma.proto
+++ b/python/spdk/sma/proto/sma.proto
@@ -112,5 +112,5 @@ service StorageManagementAgent {
     returns (AttachVolumeResponse) {}
   // Detaches a volume from a device
   rpc DetachVolume (DetachVolumeRequest)
-    returns (DetachVolumeRequest) {}
+    returns (DetachVolumeResponse) {}
 }