diff --git a/BUILD.gn b/BUILD.gn
index 98bd164..396d7d3 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -199,6 +199,12 @@
   shared_library("libEGL") {
     sources = rebase_path(egl_gypi.angle_libegl_sources, ".", "src")
 
+    defines = [
+      "GL_APICALL=",
+      "GL_GLEXT_PROTOTYPES=",
+      "EGLAPI=",
+    ]
+
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [
       ":internal_config",
@@ -206,7 +212,7 @@
     ]
 
     if (is_debug) {
-      defines = [ "ANGLE_ENABLE_PERF" ]
+      defines += [ "ANGLE_ENABLE_PERF" ]
     }
 
     include_dirs = [ "src/libGLESv2" ]
diff --git a/src/libEGL/Config.h b/src/libEGL/Config.h
index 680337b..9844114 100644
--- a/src/libEGL/Config.h
+++ b/src/libEGL/Config.h
@@ -11,7 +11,6 @@
 #ifndef INCLUDE_CONFIG_H_
 #define INCLUDE_CONFIG_H_
 
-#define EGLAPI
 #include <EGL/egl.h>
 
 #include <set>
diff --git a/src/libEGL/Surface.h b/src/libEGL/Surface.h
index 2361fcd..24c66b7 100644
--- a/src/libEGL/Surface.h
+++ b/src/libEGL/Surface.h
@@ -11,7 +11,6 @@
 #ifndef LIBEGL_SURFACE_H_
 #define LIBEGL_SURFACE_H_
 
-#define EGLAPI
 #include <EGL/egl.h>
 
 #include "common/angleutils.h"
@@ -105,7 +104,7 @@
     EGLint mSwapInterval;
     EGLint mPostSubBufferSupported;
     EGLint mFixedSize;
-    
+
     bool mSwapIntervalDirty;
     gl::Texture2D *mTexture;
 };
diff --git a/src/libEGL/main.h b/src/libEGL/main.h
index 77da8f0..07f5b9e 100644
--- a/src/libEGL/main.h
+++ b/src/libEGL/main.h
@@ -9,7 +9,6 @@
 #ifndef LIBEGL_MAIN_H_
 #define LIBEGL_MAIN_H_
 
-#define EGLAPI
 #include <EGL/egl.h>
 #include <EGL/eglext.h>