diff --git a/src/3rdparty/libpng/CMakeLists.txt b/src/3rdparty/libpng/CMakeLists.txt
index 0d98842757..b3c5bab20b 100644
--- a/src/3rdparty/libpng/CMakeLists.txt
+++ b/src/3rdparty/libpng/CMakeLists.txt
@@ -35,6 +35,7 @@ qt_internal_add_3rdparty_header_module(PngPrivate
     EXTERNAL_HEADERS
         png.h
         pngconf.h
+        pnglibconf.h
 )
 
 qt_disable_warnings(BundledLibpng)