diff --git a/src/intel/compiler/intel_shader_enums.h b/src/intel/compiler/intel_shader_enums.h
index 2e572f38db9..fb917b35427 100644
--- a/src/intel/compiler/intel_shader_enums.h
+++ b/src/intel/compiler/intel_shader_enums.h
@@ -312,7 +312,7 @@ struct intel_vue_map {
     * additional processing is applied before storing them in the VUE), the
     * value is -1.
     */
-   signed char varying_to_slot[VARYING_SLOT_TESS_MAX];
+   int8_t varying_to_slot[VARYING_SLOT_TESS_MAX];
 
    /**
     * Map from VUE slot to gl_varying_slot value.  For slots that do not
@@ -321,7 +321,7 @@ struct intel_vue_map {
     *
     * For slots that are not in use, the value is BRW_VARYING_SLOT_PAD.
     */
-   signed char slot_to_varying[VARYING_SLOT_TESS_MAX];
+   int8_t slot_to_varying[VARYING_SLOT_TESS_MAX];
 
    /**
     * Total number of VUE slots in use