diff --git a/include/cudaq/Optimizer/Dialect/Quake/QuakeTypes.td b/include/cudaq/Optimizer/Dialect/Quake/QuakeTypes.td
index 7dd31469fd..0aac6fa46c 100644
--- a/include/cudaq/Optimizer/Dialect/Quake/QuakeTypes.td
+++ b/include/cudaq/Optimizer/Dialect/Quake/QuakeTypes.td
@@ -153,9 +153,12 @@ def VeqType : QuakeType<"Veq", "veq"> {
   let hasCustomAssemblyFormat = 1;
   
   let extraClassDeclaration = [{
-    bool hasSpecifiedSize() const { return getSize(); }
+    static constexpr std::size_t kDynamicSize =
+      std::numeric_limits<std::size_t>::max();
+
+    bool hasSpecifiedSize() const { return getSize() != kDynamicSize; }
     static VeqType getUnsized(mlir::MLIRContext *ctx) {
-      return VeqType::get(ctx, 0);
+      return VeqType::get(ctx, kDynamicSize);
     }
   }];
 }
diff --git a/lib/Optimizer/Dialect/Quake/QuakeTypes.cpp b/lib/Optimizer/Dialect/Quake/QuakeTypes.cpp
index b536a59710..d124e32c3c 100644
--- a/lib/Optimizer/Dialect/Quake/QuakeTypes.cpp
+++ b/lib/Optimizer/Dialect/Quake/QuakeTypes.cpp
@@ -39,9 +39,9 @@ void quake::VeqType::print(AsmPrinter &os) const {
 Type quake::VeqType::parse(AsmParser &parser) {
   if (parser.parseLess())
     return {};
-  std::size_t size = 0;
+  std::size_t size = kDynamicSize;
   if (succeeded(parser.parseOptionalQuestion()))
-    size = 0;
+    size = kDynamicSize;
   else if (parser.parseInteger(size))
     return {};
   if (parser.parseGreater())