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-rw-r--r--src/mesa/shader/shader_api.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/mesa/shader/shader_api.c b/src/mesa/shader/shader_api.c
index 3a067fe3e1..6cfdf57a49 100644
--- a/src/mesa/shader/shader_api.c
+++ b/src/mesa/shader/shader_api.c
@@ -1011,6 +1011,11 @@ _mesa_get_uniform_location(GLcontext *ctx, GLuint program, const GLchar *name)
if (!shProg)
return -1;
+ if (shProg->LinkStatus == GL_FALSE) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetUniformfv(program)");
+ return -1;
+ }
+
/* XXX we should return -1 if the uniform was declared, but not
* actually used.
*/