diff --git a/mlir/lib/Target/IRDLToCpp/TemplatingUtils.h b/mlir/lib/Target/IRDLToCpp/TemplatingUtils.h
index aeb3c09543213..be16a1f612c5b 100644
--- a/mlir/lib/Target/IRDLToCpp/TemplatingUtils.h
+++ b/mlir/lib/Target/IRDLToCpp/TemplatingUtils.h
@@ -15,6 +15,7 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 #include <variant>
+#include <vector>
 
 namespace mlir::irdl::detail {