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-rw-r--r--src/ipcalc.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/ipcalc.c b/src/ipcalc.c
index 6a803f11..9108e4c2 100644
--- a/src/ipcalc.c
+++ b/src/ipcalc.c
@@ -319,8 +319,8 @@ int main(int argc, const char **argv) {
}
}
- if (showBroadcast || showNetwork || showPrefix) {
- if (!(netmaskStr = (char *) poptGetArg(optCon)) && (prefix < 0)) {
+ if (showBroadcast || showNetwork || showPrefix || doCheck) {
+ if (!(netmaskStr = (char *) poptGetArg(optCon)) && (prefix < 0 && !doCheck)) {
if (!beSilent) {
fprintf(stderr, "ipcalc: netmask or prefix expected\n");
poptPrintHelp(optCon, stderr, 0);