diff --git a/tc.alloc.c b/tc.alloc.c
index b87f9e9..06e0405 100644
--- a/tc.alloc.c
+++ b/tc.alloc.c
@@ -348,10 +348,12 @@ calloc(size_t i, size_t j)
 {
 #ifndef lint
     char *cp;
+    volatile size_t k;
 
     i *= j;
     cp = xmalloc(i);
-    memset(cp, 0, i);
+    k = i;
+    memset(cp, 0, k);
 
     return ((memalign_t) cp);
 #else