diff --git a/src/OpenGL/libGLESv2/libGLESv2.cpp b/src/OpenGL/libGLESv2/libGLESv2.cpp
index 541b116..d8a4a8f 100644
--- a/src/OpenGL/libGLESv2/libGLESv2.cpp
+++ b/src/OpenGL/libGLESv2/libGLESv2.cpp
@@ -962,8 +962,7 @@
 			}
 			else
 			{
-				printf("internalformat = %x, colorbufferFormat = %X\n", internalformat, colorbufferFormat);
-				UNIMPLEMENTED();
+				UNIMPLEMENTED("internalformat = %x, colorbufferFormat = %X", internalformat, colorbufferFormat);
 
 				return error(GL_INVALID_OPERATION);
 			}