diff --git a/build/build-irrlicht.sh b/build/build-irrlicht.sh
index 597414c..fcaf54a 100755
--- a/build/build-irrlicht.sh
+++ b/build/build-irrlicht.sh
@@ -18,6 +18,7 @@ disable_feature() {
 }
 enable_feature() {
     sed -i "s/^\/\/#define $1.*$/#define $1/g" include/IrrCompileConfig.h
+    sed -i "s/^#define NO_$1.*$//g" include/IrrCompileConfig.h
 }
 
 disable_feature _IRR_COMPILE_WITH_OPENGL_