diff --git a/platform/msb430/dev/dma.c b/platform/msb430/dev/dma.c
index 04a50acca..edf3b87bb 100644
--- a/platform/msb430/dev/dma.c
+++ b/platform/msb430/dev/dma.c
@@ -87,6 +87,7 @@ dma_subscribe(int line, struct process *p)
     return -1;
 
   subscribers[line] = p;
+  return 0;
 }
 
 void