diff --git a/configure.ac b/configure.ac
index c5d1268418..783ca4ea33 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,7 @@ case "$efl_api" in
     eo)
         EFL_API_LEGACY_DEF="#define EFL_NOLEGACY_API_SUPPORT"
         EFL_API_EO_DEF="#define EFL_EO_API_SUPPORT"
+        CFOPT_WARNING="xyes"
         ;;
     legacy)
         EFL_API_LEGACY_DEF=""
@@ -4902,6 +4903,16 @@ if test -n "$CFOPT_WARNING"; then
     echo "that, as opposed to compiling it out."
     echo "_____________________________________________________________________"
   fi
+  if test "x${efl_api}" = "xeo"; then
+    echo "_____________________________________________________________________"
+    echo "Using the EO based EFL API only does not work at the moment. We still"
+    echo "have a lot code that depends on the legacy interfaces. We provide"
+    echo "this option for testing once we are able to migrate to the EO based"
+    echo "API."
+    echo "If you are not working on this migration please leave the option set"
+    echo "to both as it will break your build if set to eo."
+    echo "_____________________________________________________________________"
+  fi
   echo "_____________________________________________________________________"
   echo ""
   echo "==-- WARNING --=="