diff --git a/_maps/_basemap.dm b/_maps/_basemap.dm
index 853bb0cce4924..f56eb5147fb1d 100644
--- a/_maps/_basemap.dm
+++ b/_maps/_basemap.dm
@@ -1,5 +1,17 @@
 //#define LOWMEMORYMODE //uncomment this to load centcom and runtime station and thats it.
 
+// uncomment this for a map you need to use
+// #define FORCE_MAP "corgstation"
+// #define FORCE_MAP "boxstation"
+// #define FORCE_MAP "metastation"
+// #define FORCE_MAP "deltastation"
+// #define FORCE_MAP "kilostation"
+// #define FORCE_MAP "flandstation"
+// #define FORCE_MAP "radstation"
+// #define FORCE_MAP "echostation"
+// #define FORCE_MAP "runtimestation"
+// #define FORCE_MAP "multiz_debug"
+
 #include "map_files\generic\CentCom.dmm"
 
 #ifndef LOWMEMORYMODE
diff --git a/code/_compile_options.dm b/code/_compile_options.dm
index 303a8c1ed836a..931aa9e059103 100644
--- a/code/_compile_options.dm
+++ b/code/_compile_options.dm
@@ -85,8 +85,12 @@
 
 //#define LOWMEMORYMODE
 #ifdef LOWMEMORYMODE
-#warn WARNING: Compiling with LOWMEMORYMODE.
-#define FORCE_MAP "runtimestation"
+	#warn WARNING: Compiling with LOWMEMORYMODE.
+	#ifdef FORCE_MAP
+	#warn WARNING: FORCE_MAP is already defined.
+	#else
+	#define FORCE_MAP "runtimestation"
+	#endif
 #endif
 
 //TODO Remove the SDMM check when it supports 1568