diff --git a/src/gallium/auxiliary/tgsi/tgsi_info.c b/src/gallium/auxiliary/tgsi/tgsi_info.c
index 3fce789..3a969ee 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_info.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_info.c
@@ -498,6 +498,7 @@ tgsi_opcode_infer_src_type( uint opcode )
    case TGSI_OPCODE_UMUL_HI:
    case TGSI_OPCODE_UMSB:
    case TGSI_OPCODE_U2I64:
+   case TGSI_OPCODE_MEMBAR:
       return TGSI_TYPE_UNSIGNED;
    case TGSI_OPCODE_IMUL_HI:
    case TGSI_OPCODE_I2F: