diff --git a/src/mesa/shader/arbprogparse.c b/src/mesa/shader/arbprogparse.c
index ead0580ed43..10fa1965865 100644
--- a/src/mesa/shader/arbprogparse.c
+++ b/src/mesa/shader/arbprogparse.c
@@ -1616,10 +1616,10 @@ parse_attrib_binding(GLcontext * ctx, const GLubyte ** inst,
 
    if (err) {
       program_error(ctx, Program->Position, "Bad attribute binding");
+   } else {
+       Program->Base.InputsRead |= (1 << *inputReg);
    }
 
-   Program->Base.InputsRead |= (1 << *inputReg);
-
    return err;
 }