diff --git a/scripts.d/50-openh264.sh b/scripts.d/50-openh264.sh
index 80c6218..1f731f2 100755
--- a/scripts.d/50-openh264.sh
+++ b/scripts.d/50-openh264.sh
@@ -13,6 +13,7 @@ ffbuild_dockerbuild() {
 
     local myconf=(
         PREFIX="$FFBUILD_PREFIX"
+        INCLUDE_PREFIX="$FFBUILD_PREFIX"/include/wels
         BUILDTYPE=Release
         DEBUGSYMBOLS=False
         LIBDIR_NAME=lib