diff --git a/src/intel/isl/isl_format.c b/src/intel/isl/isl_format.c
index 160a00bfc80..d62c8f2e2ca 100644
--- a/src/intel/isl/isl_format.c
+++ b/src/intel/isl/isl_format.c
@@ -1294,7 +1294,7 @@ pack_channel(const union isl_color_value *value, unsigned i,
       packed = MIN(value->u32[i], u_uintN_max(layout->bits));
       break;
    case ISL_SINT:
-      packed = CLAMP(value->u32[i], u_intN_min(layout->bits),
+      packed = CLAMP(value->i32[i], u_intN_min(layout->bits),
                      u_intN_max(layout->bits));
       break;