diff --git a/aten/src/ATen/core/library.cpp b/aten/src/ATen/core/library.cpp
index 5dcac2b0e2f..9aec96a9022 100644
--- a/aten/src/ATen/core/library.cpp
+++ b/aten/src/ATen/core/library.cpp
@@ -1,6 +1,7 @@
 #include <torch/library.h>
 
 #include <ATen/core/dispatch/Dispatcher.h>
+#include <fmt/format.h>
 
 namespace torch {
 
@@ -11,7 +12,7 @@ namespace {
 #ifdef STRIP_ERROR_MESSAGES
     return std::string();
 #else
-    return c10::str("registered at ", file, ":", line);
+    return fmt::format("registered at {}:{}", file, line);
 #endif
   }