diff --git a/network/ncrack/ncrack.SlackBuild b/network/ncrack/ncrack.SlackBuild
index e7fa0d50de..c99b3248a4 100644
--- a/network/ncrack/ncrack.SlackBuild
+++ b/network/ncrack/ncrack.SlackBuild
@@ -71,7 +71,7 @@ find -L . \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
 CFLAGS="$SLKCFLAGS" \
-CXXFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS -fpermissive" \
 ./configure \
   --prefix=/usr \
   --libdir=/usr/lib${LIBDIRSUFFIX} \