diff --git a/dlls/windowscodecs/libpng.c b/dlls/windowscodecs/libpng.c
index ee02d493f57..a5068c20349 100644
--- a/dlls/windowscodecs/libpng.c
+++ b/dlls/windowscodecs/libpng.c
@@ -997,6 +997,7 @@ HRESULT CDECL png_encoder_create(struct encoder_info *info, struct encoder **res
     This->data = NULL;
     *result = &This->encoder;
 
+    info->flags = 0;
     info->container_format = GUID_ContainerFormatPng;
     info->clsid = CLSID_WICPngEncoder;
     info->encoder_options[0] = ENCODER_OPTION_INTERLACE;