diff --git a/src/d_net.cpp b/src/d_net.cpp
index 04269f1d883..8a21205bd3c 100644
--- a/src/d_net.cpp
+++ b/src/d_net.cpp
@@ -2049,7 +2049,7 @@ FDynamicBuffer::~FDynamicBuffer ()
 {
 	if (m_Data)
 	{
-		free (m_Data);
+		M_Free (m_Data);
 		m_Data = NULL;
 	}
 	m_Len = m_BufferLen = 0;
diff --git a/src/p_states.cpp b/src/p_states.cpp
index 133ac4ad67f..8ec19e6538b 100644
--- a/src/p_states.cpp
+++ b/src/p_states.cpp
@@ -154,7 +154,7 @@ void FStateLabels::Destroy ()
 		if (Labels[i].Children != NULL)
 		{
 			Labels[i].Children->Destroy();
-			free(Labels[i].Children);	// These are malloc'd, not new'd!
+			M_Free(Labels[i].Children);	// These are malloc'd, not new'd!
 			Labels[i].Children = NULL;
 		}
 	}