diff --git a/reactos/dll/3rdparty/mesa32/mesa32.rbuild b/reactos/dll/3rdparty/mesa32/mesa32.rbuild
index 2cefd2f5065..d160a8df692 100644
--- a/reactos/dll/3rdparty/mesa32/mesa32.rbuild
+++ b/reactos/dll/3rdparty/mesa32/mesa32.rbuild
@@ -16,8 +16,10 @@
 		<define name="USE_MMX_ASM" />
 		<define name="USE_SSE_ASM" />
 	</if>
+	<ifnot property="ARCH" value="i386">
+		<define name="GL_NO_STDCALL" />
+	</ifnot>
 	<define name="USE_3DNOW_ASM" />
-	<define name="GL_NO_STDCALL" />
 	<include base="mesa32">include</include>
 	<include base="mesa32">src</include>
 	<include base="mesa32">src/main</include>