diff --git a/src/cmd/cgo/out.go b/src/cmd/cgo/out.go
index 20b688b7db2..0f58528c593 100644
--- a/src/cmd/cgo/out.go
+++ b/src/cmd/cgo/out.go
@@ -447,7 +447,7 @@ func checkImportSymName(s string) {
 		}
 	}
 	if strings.Contains(s, "//") || strings.Contains(s, "/*") {
-		fatalf("dynamic symbol %q contains Go comment")
+		fatalf("dynamic symbol %q contains Go comment", s)
 	}
 }