diff --git a/internal/backends/compiler_wat/wir/util.go b/internal/backends/compiler_wat/wir/util.go
index cb21bd6..8a5f483 100644
--- a/internal/backends/compiler_wat/wir/util.go
+++ b/internal/backends/compiler_wat/wir/util.go
@@ -166,7 +166,7 @@ func (m *Module) GenValueType(from types.Type) ValueType {
 
 func IsNumber(v Value) bool {
 	switch v.Type().(type) {
-	case *tI8, *tU8, *tI16, *tU16, *tI32, *tU32, *tI64, *tU64, *tF32, *tF64:
+	case *tI8, *tU8, *tI16, *tU16, *tI32, *tU32, *tI64, *tU64, *tF32, *tF64, *tBool:
 		return true
 	}