diff --git a/src/nanovg.h b/src/nanovg.h
index 9718ba8..20ee98c 100644
--- a/src/nanovg.h
+++ b/src/nanovg.h
@@ -437,7 +437,14 @@ struct NVGparams {
 struct NVGcontext* nvgCreateInternal(struct NVGparams* params);
 void nvgDeleteInternal(struct NVGcontext* ctx);
 
-#define NVG_NOTUSED(v)  (void)sizeof(v)
+// Compiler references
+// http://sourceforge.net/p/predef/wiki/Compilers/
+#if _MSC_VER >= 1800
+	// VS 2013 seems to be too smart for school, it will still list the variable as unused if passed into sizeof().
+	#define NVG_NOTUSED(v) do { (void)(v); } while(0)
+#else
+	#define NVG_NOTUSED(v)  (void)sizeof(v)
+#endif
 
 #ifdef __cplusplus
 }
diff --git a/src/nanovg_gl2.h b/src/nanovg_gl2.h
index 654dfcb..6994772 100644
--- a/src/nanovg_gl2.h
+++ b/src/nanovg_gl2.h
@@ -728,7 +728,7 @@ static void glnvg__renderFill(void* uptr, struct NVGpaint* paint, struct NVGscis
 		glDisable(GL_BLEND);
 		glEnable(GL_STENCIL_TEST);
 		glStencilMask(0xff);
-		glStencilFunc(GL_ALWAYS, 0, ~0);
+		glStencilFunc(GL_ALWAYS, 0, ~0U);
 		glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
 
 		glUseProgram(gl->shader.prog);