diff --git a/src/rest.cpp b/src/rest.cpp
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -37,7 +37,7 @@
 };
 
 static const struct {
-    enum RetFormat rf;
+    RetFormat rf;
     const char *name;
 } rf_names[] = {
     {RetFormat::UNDEF, ""},
@@ -72,8 +72,8 @@
     return false;
 }
 
-static enum RetFormat ParseDataFormat(std::string &param,
-                                      const std::string &strReq) {
+static RetFormat ParseDataFormat(std::string &param,
+                                 const std::string &strReq) {
     const std::string::size_type pos = strReq.rfind('.');
     if (pos == std::string::npos) {
         param = strReq;