diff --git a/src/amd/compiler/aco_opt_value_numbering.cpp b/src/amd/compiler/aco_opt_value_numbering.cpp
index 98aab2cb5af..19c5b597725 100644
--- a/src/amd/compiler/aco_opt_value_numbering.cpp
+++ b/src/amd/compiler/aco_opt_value_numbering.cpp
@@ -278,7 +278,7 @@ struct InstrPred {
       case Format::EXP:
       case Format::SOPP:
       case Format::PSEUDO_BRANCH:
-      case Format::PSEUDO_BARRIER: assert(false);
+      case Format::PSEUDO_BARRIER: unreachable("unsupported instruction format");
       default: return true;
       }
    }