diff --git a/tools/emulator/opengl/system/GLESv1_enc/gl.attrib b/tools/emulator/opengl/system/GLESv1_enc/gl.attrib
index 37934aa2f..fed0f7afa 100644
--- a/tools/emulator/opengl/system/GLESv1_enc/gl.attrib
+++ b/tools/emulator/opengl/system/GLESv1_enc/gl.attrib
@@ -475,7 +475,7 @@ glDeleteRenderbuffersOES
 
 #void glGenRenderbuffersOES(GLsizei n, GLuint *renderbuffers)
 glGenRenderbuffersOES
-	dir renderbuffers in
+	dir renderbuffers out 
 	len renderbuffers (n * sizeof(GLuint))
     param_check n if(n<0){ ctx->setError(GL_INVALID_VALUE); return; }