diff --git a/contrib/kiss-chroot b/contrib/kiss-chroot
index 86212db..71bfbb2 100755
--- a/contrib/kiss-chroot
+++ b/contrib/kiss-chroot
@@ -49,7 +49,7 @@ main() {
             USER=root \
             KISS_ASROOT=1 \
             CFLAGS="${2:--march=x86-64 -mtune=generic -pipe -Os}" \
-            CXXFLAGS="${2:---march=x86-64 -mtune=generic -pipe -Os}" \
+            CXXFLAGS="${2:--march=x86-64 -mtune=generic -pipe -Os}" \
             MAKEFLAGS="-j$(nproc 2>/dev/null || echo 1)" \
             /bin/sh -l
     }