diff --git a/lib32-libxcb/trunk/PKGBUILD b/lib32-libxcb/trunk/PKGBUILD
index 444dd98..08808f6 100644
--- a/lib32-libxcb/trunk/PKGBUILD
+++ b/lib32-libxcb/trunk/PKGBUILD
@@ -34,7 +34,7 @@ build() {
   export CC="gcc -m32"
   export PKG_CONFIG_PATH="/usr/lib32/pkgconfig"
 
-  ./autogen.sh \
+  ./autogen.sh CFLAGS="-O1" \
          --prefix=/usr \
          --enable-xinput \
           --enable-xkb \