diff --git a/code/__DEFINES/MC.dm b/code/__DEFINES/MC.dm
index fe48edd266..65be8258a1 100644
--- a/code/__DEFINES/MC.dm
+++ b/code/__DEFINES/MC.dm
@@ -20,7 +20,7 @@
 #define NEW_SS_GLOBAL(varname) if(varname != src){if(istype(varname)){Recover();qdel(varname);}varname = src;}
 
 #define START_PROCESSING(Processor, Datum) if (!(Datum.datum_flags & DF_ISPROCESSING)) {Datum.datum_flags |= DF_ISPROCESSING;Processor.processing += Datum}
-#define STOP_PROCESSING(Processor, Datum) Datum.datum_flags &= ~DF_ISPROCESSING;Processor.processing -= Datum
+#define STOP_PROCESSING(Processor, Datum) Datum.datum_flags &= ~DF_ISPROCESSING;Processor.processing -= Datum;Processor.currentrun -= Datum
 
 //SubSystem flags (Please design any new flags so that the default is off, to make adding flags to subsystems easier)