diff --git a/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp b/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
index 71326049af057..7f748cfbd31ad 100644
--- a/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
@@ -3058,7 +3058,7 @@ void OpEmitter::genCodeForAddingArgAndRegionForBuilder(
         body << llvm::formatv(
             "static_cast<int32_t>(std::accumulate({0}.begin(), {0}.end(), 0, "
             "[](int32_t curSum, ::mlir::ValueRange range) {{ return curSum + "
-            "range.size(); }))",
+            "static_cast<int32_t>(range.size()); }))",
             operandName);
       } else {
         body << "static_cast<int32_t>(" << getArgumentName(op, i) << ".size())";