--- a/src/google/protobuf/compiler/python/helpers.cc	(62b83ba8ff1149a180456030d46ca0881711b0e5)
+++ b/src/google/protobuf/compiler/python/helpers.cc	(94b865765aa38dc5e4ac99e0051d228ebc9d2a80)
@@ -50,9 +50,18 @@ namespace protobuf {
 namespace compiler {
 namespace python {
 
+TProtoStringType FixEv(TProtoStringType filename) {
+    constexpr auto kSuffixLen = 3;
+    if (filename.EndsWith(".ev")) {
+        return filename.substr(0, filename.length() - kSuffixLen) + "_ev.proto";
+    }
+    return filename;
+}
+
 // Returns the Python module name expected for a given .proto filename.
 TProtoStringType ModuleName(absl::string_view filename) {
-  TProtoStringType basename = StripProto(filename);
+  TProtoStringType str(std::string{filename});
+  TProtoStringType basename = StripProto(FixEv(str));
   absl::StrReplaceAll({{"-", "_"}, {"/", "."}}, &basename);
   return absl::StrCat(basename, "_pb2");
 }