diff --git a/example/example_gles2.c b/example/example_gles2.c
index f204237..06e4214 100644
--- a/example/example_gles2.c
+++ b/example/example_gles2.c
@@ -20,8 +20,7 @@
 #define GLFW_INCLUDE_ES2
 #include <GLFW/glfw3.h>
 #include "nanovg.h"
-#define NANOVG_GL2_IMPLEMENTATION
-#define NANOVG_GLES2
+#define NANOVG_GLES2_IMPLEMENTATION
 #include "nanovg_gl2.h"
 #include "demo.h"
 
diff --git a/example/example_gles3.c b/example/example_gles3.c
index c070dd5..3fa0caf 100644
--- a/example/example_gles3.c
+++ b/example/example_gles3.c
@@ -20,8 +20,7 @@
 #define GLFW_INCLUDE_ES3
 #include <GLFW/glfw3.h>
 #include "nanovg.h"
-#define NANOVG_GL3_IMPLEMENTATION
-#define NANOVG_GLES3
+#define NANOVG_GLES3_IMPLEMENTATION
 #include "nanovg_gl3.h"
 #include "demo.h"
 
diff --git a/src/nanovg_gl2.h b/src/nanovg_gl2.h
index a0e5397..0db4e21 100644
--- a/src/nanovg_gl2.h
+++ b/src/nanovg_gl2.h
@@ -24,6 +24,15 @@ extern "C" {
 
 #define NVG_ANTIALIAS 1
 
+#ifdef NANOVG_GLES2_IMPLEMENTATION
+#  ifndef NANOVG_GLES2
+#    define NANOVG_GLES2
+#  endif
+#  ifndef NANOVG_GL2_IMPLEMENTATION
+#    define NANOVG_GL2_IMPLEMENTATION
+#  endif
+#endif
+
 #ifdef NANOVG_GLES2
 
 struct NVGcontext* nvgCreateGLES2(int atlasw, int atlash, int edgeaa);
diff --git a/src/nanovg_gl3.h b/src/nanovg_gl3.h
index 57f0d63..4a83d55 100644
--- a/src/nanovg_gl3.h
+++ b/src/nanovg_gl3.h
@@ -24,6 +24,15 @@ extern "C" {
 
 #define NVG_ANTIALIAS 1
 
+#ifdef NANOVG_GLES3_IMPLEMENTATION
+#  ifndef NANOVG_GLES3
+#    define NANOVG_GLES3
+#  endif
+#  ifndef NANOVG_GL3_IMPLEMENTATION
+#    define NANOVG_GL3_IMPLEMENTATION
+#  endif
+#endif
+
 #ifdef NANOVG_GLES3
 
 struct NVGcontext* nvgCreateGLES3(int atlasw, int atlash, int edgeaa);