diff --git a/common/lib/debug.c b/common/lib/debug.c
index e275f83..fe19530 100644
--- a/common/lib/debug.c
+++ b/common/lib/debug.c
@@ -59,6 +59,7 @@ int debug(int class,char *format,...)
     va_start(ap,format);
     vfprintf(stderr,format,ap);
     fprintf(stderr,"\n");
+    va_end(ap);
     return(0);
   }