diff --git a/src/gallium/auxiliary/tgsi/util/tgsi_sanity.c b/src/gallium/auxiliary/tgsi/util/tgsi_sanity.c
index 9673f061ce3..2e3ec96b5b5 100644
--- a/src/gallium/auxiliary/tgsi/util/tgsi_sanity.c
+++ b/src/gallium/auxiliary/tgsi/util/tgsi_sanity.c
@@ -198,7 +198,7 @@ iter_instruction(
          inst->FullSrcRegisters[i].SrcRegister.File,
          inst->FullSrcRegisters[i].SrcRegister.Index,
          "source",
-         inst->FullSrcRegisters[i].SrcRegister.Indirect );
+         (boolean)inst->FullSrcRegisters[i].SrcRegister.Indirect );
       if (inst->FullSrcRegisters[i].SrcRegister.Indirect) {
          uint file;
          int index;