diff --git a/src/d_iwad.cpp b/src/d_iwad.cpp
index f10d48fb7..fadb9e65b 100644
--- a/src/d_iwad.cpp
+++ b/src/d_iwad.cpp
@@ -583,7 +583,7 @@ int FIWadManager::IdentifyVersion (TArray<FString> &wadfiles, const char *iwad,
 		// We have a -iwad parameter. Pick the first usable IWAD we found through that.
 		for (unsigned i = numFoundWads; i < mFoundWads.Size(); i++)
 		{
-			if (mFoundWads[i].mInfoIndex > 0)
+			if (mFoundWads[i].mInfoIndex >= 0)
 			{
 				picks.Push(mFoundWads[i]);
 				break;