diff --git a/procps/uptime.c b/procps/uptime.c
index 38d58af..0042889 100644
--- a/procps/uptime.c
+++ b/procps/uptime.c
@@ -35,7 +35,9 @@
 #include <stdlib.h>
 #include "busybox.h"
 
-static const int FSHIFT = 16;              /* nr of bits of precision */
+#ifndef FSHIFT
+# define FSHIFT 16              /* nr of bits of precision */
+#endif
 #define FIXED_1         (1<<FSHIFT)     /* 1.0 as fixed-point */
 #define LOAD_INT(x) ((x) >> FSHIFT)
 #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)