diff --git a/src/p_secnodes.cpp b/src/p_secnodes.cpp
index 14d354a7f..38a9a5bab 100644
--- a/src/p_secnodes.cpp
+++ b/src/p_secnodes.cpp
@@ -24,6 +24,7 @@
 #include "r_state.h"
 #include "p_maputl.h"
 #include "p_blockmap.h"
+#include "memarena.h"
 
 //=============================================================================
 // phares 3/21/98
@@ -32,6 +33,7 @@
 //=============================================================================
 
 msecnode_t *headsecnode = NULL;
+FMemArena secnodearena;
 
 //=============================================================================
 //
@@ -53,7 +55,8 @@ msecnode_t *P_GetSecnode()
 	}
 	else
 	{
-		node = (msecnode_t *)M_Malloc(sizeof(*node));
+		node = 
+		node = (msecnode_t *)secnodearena.Alloc(sizeof(*node));
 	}
 	return node;
 }
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index 00e854c54..88694a8cf 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -3552,6 +3552,7 @@ void P_FreeLevelData ()
 	P_ClearUDMFKeys();
 }
 
+extern FMemArena secnodearena;
 extern msecnode_t *headsecnode;
 
 void P_FreeExtraLevelData()
@@ -3569,19 +3570,11 @@ void P_FreeExtraLevelData()
 		}
 		FBlockNode::FreeBlocks = NULL;
 	}
-	{
-		msecnode_t *node = headsecnode;
-
-		while (node != NULL)
-		{
-			msecnode_t *next = node->m_snext;
-			M_Free (node);
-			node = next;
-		}
-		headsecnode = NULL;
-	}
+	secnodearena.FreeAllBlocks();
+	headsecnode = nullptr;
 }
 
+
 //
 // P_SetupLevel
 //