diff --git a/flang/include/flang/Semantics/symbol.h b/flang/include/flang/Semantics/symbol.h
index 571d4ccacfec4..fb53c61c7d23c 100644
--- a/flang/include/flang/Semantics/symbol.h
+++ b/flang/include/flang/Semantics/symbol.h
@@ -700,7 +700,7 @@ template <std::size_t BLOCK_SIZE> class Symbols {
   std::list<blockType *> blocks_;
   std::size_t nextIndex_{0};
   blockType *currBlock_{nullptr};
-  std::size_t symbolCount_ = 0;
+  static inline std::size_t symbolCount_ = 0;
 
   Symbol &Get() {
     if (nextIndex_ == 0) {