diff --git a/apps/speed.c b/apps/speed.c
index 691b4b634..24d41227b 100644
--- a/apps/speed.c
+++ b/apps/speed.c
@@ -225,7 +225,7 @@
 
 #undef BUFSIZE
 #define BUFSIZE	((long)1024*8+1)
-int run=0;
+static volatile int run=0;
 
 static int mr=0;
 static int usertime=1;