diff --git a/src/V3Ast.h b/src/V3Ast.h
index 3a669deb9..e8bc544ac 100644
--- a/src/V3Ast.h
+++ b/src/V3Ast.h
@@ -1410,6 +1410,8 @@ public:
     void dtypeChgWidthSigned(int width, int widthMin, AstNumeric numeric);
     void dtypeSetBitUnsized(int width, int widthMin, AstNumeric numeric) {
         dtypep(findBitDType(width, widthMin, numeric)); }
+    void dtypeSetBitSized(int width, AstNumeric numeric) {
+        dtypep(findBitDType(width, width, numeric)); }  // Since sized, widthMin is width
     void dtypeSetLogicUnsized(int width, int widthMin, AstNumeric numeric) {
         dtypep(findLogicDType(width, widthMin, numeric)); }
     void dtypeSetLogicSized(int width, AstNumeric numeric) {
diff --git a/src/V3AstNodes.h b/src/V3AstNodes.h
index ccfeb61f4..5e873f96b 100644
--- a/src/V3AstNodes.h
+++ b/src/V3AstNodes.h
@@ -1234,7 +1234,7 @@ public:
         , m_name(name), m_origName(name) {
         init();
         combineType(type);
-        dtypeSetLogicSized(wantwidth, AstNumeric::UNSIGNED);
+        dtypeSetBitSized(wantwidth, AstNumeric::UNSIGNED);
         m_declKwd = AstBasicDTypeKwd::BIT;
     }
     AstVar(FileLine* fl, AstVarType type, const string& name, AstVar* examplep)