diff --git a/gfx/angle/checkout/include/GLSLANG/ShaderVars.h b/gfx/angle/checkout/include/GLSLANG/ShaderVars.h
index 3ff8618..6adb28d 100644
--- a/gfx/angle/checkout/include/GLSLANG/ShaderVars.h
+++ b/gfx/angle/checkout/include/GLSLANG/ShaderVars.h
@@ -12,6 +12,7 @@

 #include <algorithm>
 #include <array>
+#include <cstdint>
 #include <string>
 #include <vector>