diff --git a/src/mesa/shader/prog_instruction.h b/src/mesa/shader/prog_instruction.h
index 100aac4b97f..8514cf69ecf 100644
--- a/src/mesa/shader/prog_instruction.h
+++ b/src/mesa/shader/prog_instruction.h
@@ -401,7 +401,7 @@ struct prog_instruction
    /**
     * For BRA and CAL instructions, the location to jump to.
     */
-   GLuint BranchTarget;
+   GLint BranchTarget;
 
    /**
     * For TEX instructions in shaders, the sampler to use for the