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-rw-r--r--libbb/xgetlarg.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/libbb/xgetlarg.c b/libbb/xgetlarg.c
index 0460aad57..f24492bee 100644
--- a/libbb/xgetlarg.c
+++ b/libbb/xgetlarg.c
@@ -21,8 +21,10 @@ extern long bb_xgetlarg(const char *arg, int base, long lower, long upper)
assert(arg!=NULL);
- /* Don't allow leading whitespace. */
- if (isspace(*arg)) { /* Use an actual function call for minimal size. */
+ /* Don't allow leading whitespace.
+ * Wrap isspace in () to make sure we call the
+ * function rather than the macro. */
+ if ((isspace)(*arg)) {
bb_show_usage();
}