1 files changed, 0 insertions, 1 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 831fe2dc45..3f99c28f0a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -16,7 +16,6 @@ config("pdfium_config") {
   defines = [
     "OPJ_STATIC",
     "PNG_PREFIX",
-    "PNGPREFIX_H",
     "PNG_USE_READ_MACROS",
     "V8_DEPRECATION_WARNINGS",
     "_CRT_SECURE_NO_WARNINGS",