diff --git a/src/Mass/Mass.cpp b/src/Mass/Mass.cpp
index a1a8109..3a42e54 100644
--- a/src/Mass/Mass.cpp
+++ b/src/Mass/Mass.cpp
@@ -106,6 +106,10 @@ void Mass::refreshValues() {
         }
     }
 
+    if(_mass->saveType() != "/Game/Core/Save/bpSaveGameUnit.bpSaveGameUnit_C"_s) {
+        Utility::Error{} << _filename << "is not a valid unit save.";
+    }
+
     auto unit_data = _mass->at<GenericStructProperty>("UnitData"_s);
     if(!unit_data) {
         Utility::Error{} << "Couldn't find unit data in" << _filename;
diff --git a/src/Profile/Profile.cpp b/src/Profile/Profile.cpp
index c65fa6d..5e3a65f 100644
--- a/src/Profile/Profile.cpp
+++ b/src/Profile/Profile.cpp
@@ -106,6 +106,10 @@ void Profile::refreshValues() {
         return;
     }
 
+    if(_profile.saveType() != "/Game/Core/Save/bpSaveGameProfile.bpSaveGameProfile_C"_s) {
+        Utility::Error{} << _filename << "is not a valid profile save.";
+    }
+
     auto name_prop = _profile.at<StringProperty>("CompanyName"_s);
     if(!name_prop) {
         _lastError = "No company name in "_s + _filename;