diff --git a/src/intel/compiler/brw_ir.h b/src/intel/compiler/brw_ir.h
index e7f54798303..3b4b19c244a 100644
--- a/src/intel/compiler/brw_ir.h
+++ b/src/intel/compiler/brw_ir.h
@@ -194,10 +194,10 @@ struct backend_instruction {
                               */
    bool eot:1;
 
-   /* Chooses which flag subregister (f0.0 to f1.1) is used for conditional
+   /* Chooses which flag subregister (f0.0 to f3.1) is used for conditional
     * mod and predication.
     */
-   unsigned flag_subreg:2;
+   unsigned flag_subreg:3;
 
    /**
     * Systolic depth used by DPAS instruction.