diff --git a/configure b/configure
index f28be4a465..8949cf5440 100755
--- a/configure
+++ b/configure
@@ -72,6 +72,7 @@ SRCS="`< $ROOT_DIR/source.list tr '\r' '\n' | awk '
 
 		if ($0 == "SDL"         && "'$sdl_config'" == "")          { next; }
 		if ($0 == "OSX"         && "'$os'" != "OSX")               { next; }
+		if ($0 == "OS2"         && "'$os'" != "OS2")               { next; }
 		if ($0 == "DEDICATED"   && "'$enable_dedicated'" != "1")   { next; }
 		if ($0 == "COCOA"       && "'$with_cocoa'" == "0")         { next; }
 		if ($0 == "BEOS"        && "'$os'" != "BEOS")              { next; }
diff --git a/source.list b/source.list
index db35bd4e0f..ec563a8577 100644
--- a/source.list
+++ b/source.list
@@ -71,7 +71,11 @@ thread.cpp
 tile.cpp
 #if WIN32
 #else
-	unix.cpp
+	#if OS2
+		os2.cpp
+	#else
+		unix.cpp
+	#end
 #end
 vehicle.cpp
 viewport.cpp