diff --git a/docs/examples/chkspeed.c b/docs/examples/chkspeed.c
index 00db5bf1d4bfd61eeea7b01ba35dc8b18787c623..4305bde8df361902aa32fee39741acb733484d4b 100644
--- a/docs/examples/chkspeed.c
+++ b/docs/examples/chkspeed.c
@@ -71,7 +71,7 @@ int main(int argc, char *argv[])
         } else if (strncasecmp(*argv, "-T", 2) == 0) {
           prttime = 1;
         } else if (strncasecmp(*argv, "-M=", 3) == 0) {
-          long m = strtol(argv+3, NULL, 10);
+          long m = strtol((*argv)+3, NULL, 10);
           switch(m) {
             case   1: url = URL_1M;
                       break;