diff --git a/scripts.d/50-libmp3lame.sh b/scripts.d/50-libmp3lame.sh
index c9ed783..e5418f2 100755
--- a/scripts.d/50-libmp3lame.sh
+++ b/scripts.d/50-libmp3lame.sh
@@ -33,6 +33,8 @@ ffbuild_dockerbuild() {
         return -1
     fi
 
+    export CFLAGS="$CFLAGS -DNDEBUG"
+
     ./configure "${myconf[@]}"
     make -j$(nproc)
     make install