diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index f59a5f104..401f9899d 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,6 @@
 April 21, 2006 (Changes by Graf Zahl)
+- Fixed: To prevent the pointer cleanup code from crashing numsectors has
+  to be set to 0 when the sectors array is deleted.
 - Added Zloba's fix for Linux's I_FindFirst.
 
 April 20, 2006 (Changes by Graf Zahl)
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index 932ebb510..32627fe1c 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -2804,6 +2804,7 @@ void P_FreeLevelData ()
 	{
 		delete[] sectors;
 		sectors = NULL;
+		numsectors = 0;	// needed for the pointer cleanup code
 	}
 	if (subsectors != NULL)
 	{