diff --git a/flang/lib/Evaluate/common.cpp b/flang/lib/Evaluate/common.cpp
--- a/flang/lib/Evaluate/common.cpp
+++ b/flang/lib/Evaluate/common.cpp
@@ -22,7 +22,7 @@
     if (std::strcmp(operation, "division") == 0) {
       context.messages().Say("division by zero"_warn_en_US);
     } else {
-      context.messages().Say("division on %s"_warn_en_US);
+      context.messages().Say("division on %s"_warn_en_US, operation);
     }
   }
   if (flags.test(RealFlag::InvalidArgument)) {