diff --git a/googlemock/include/gmock/gmock-matchers.h b/googlemock/include/gmock/gmock-matchers.h
--- a/googlemock/include/gmock/gmock-matchers.h
+++ b/googlemock/include/gmock/gmock-matchers.h
@@ -3932,7 +3932,7 @@ class ArgsMatcherImpl : public MatcherInterface<ArgsTuple> {
     const char* sep = "";
     // Workaround spurious C4189 on MSVC<=15.7 when k is empty.
     (void)sep;
-    const char* dummy[] = {"", (*os << sep << "#" << k, sep = ", ")...};
+    const char* dummy[] = {"", (static_cast<void>(*os << sep << "#" << k), sep = ", ")...};
     (void)dummy;
     *os << ") ";
   }