diff --git a/src/V3AstNodeExpr.h b/src/V3AstNodeExpr.h
index c5ac75048..111edca1e 100644
--- a/src/V3AstNodeExpr.h
+++ b/src/V3AstNodeExpr.h
@@ -987,7 +987,7 @@ public:
     class VerilogStringLiteral {};  // for creator type-overload selection
     AstConst(FileLine* fl, VerilogStringLiteral, const string& str)
         : ASTGEN_SUPER_Const(fl)
-        , m_num(V3Number::VerilogStringLiteral{}, this, str) {
+        , m_num{V3Number::VerilogStringLiteral{}, this, str} {
         initWithNumber();
     }
     AstConst(FileLine* fl, uint32_t num)
@@ -1033,7 +1033,7 @@ public:
     class String {};  // for creator type-overload selection
     AstConst(FileLine* fl, String, const string& num)
         : ASTGEN_SUPER_Const(fl)
-        , m_num(V3Number::String{}, this, num) {
+        , m_num{V3Number::String{}, this, num} {
         dtypeSetString();
     }
     class BitFalse {};
@@ -1066,14 +1066,14 @@ public:
     class Null {};
     AstConst(FileLine* fl, Null)
         : ASTGEN_SUPER_Const(fl)
-        , m_num(V3Number::Null{}, this) {
+        , m_num{V3Number::Null{}, this} {
         dtypeSetBit();  // Events 1 bit, objects 64 bits, so autoExtend=1 and use bit here
         initWithNumber();
     }
     class OneStep {};
     AstConst(FileLine* fl, OneStep)
         : ASTGEN_SUPER_Const(fl)
-        , m_num(V3Number::OneStep{}, this) {
+        , m_num{V3Number::OneStep{}, this} {
         dtypeSetLogicSized(64, VSigning::UNSIGNED);
         initWithNumber();
     }