diff --git a/hpb_generator/gen_enums.cc b/hpb_generator/gen_enums.cc
index 8c3f5c2807605..eaba47164e87e 100644
--- a/hpb_generator/gen_enums.cc
+++ b/hpb_generator/gen_enums.cc
@@ -111,12 +111,5 @@ void WriteEnumDeclarations(
   }
 }
 
-void WriteHeaderEnumForwardDecls(
-    std::vector<const protobuf::EnumDescriptor*>& enums, Output& output) {
-  for (const auto* enumdesc : enums) {
-    output("enum $0 : int;\n", EnumTypeName(enumdesc));
-  }
-}
-
 }  // namespace protobuf
 }  // namespace google::hpb_generator
diff --git a/hpb_generator/gen_enums.h b/hpb_generator/gen_enums.h
index 63455833950fe..bbe475c726669 100644
--- a/hpb_generator/gen_enums.h
+++ b/hpb_generator/gen_enums.h
@@ -19,8 +19,6 @@ std::string EnumTypeName(const protobuf::EnumDescriptor* enum_descriptor);
 std::string EnumValueSymbolInNameSpace(
     const protobuf::EnumDescriptor* desc,
     const protobuf::EnumValueDescriptor* value);
-void WriteHeaderEnumForwardDecls(
-    std::vector<const protobuf::EnumDescriptor*>& enums, Output& output);
 void WriteEnumDeclarations(
     const std::vector<const protobuf::EnumDescriptor*>& enums, Output& output);