diff --git a/scpserver.c b/scpserver.c
index 794d6143..da047823 100644
--- a/scpserver.c
+++ b/scpserver.c
@@ -521,6 +521,9 @@ static void scp_source_free(ScpServer *s)
         scp->head = node->next;
         sfree(node);
     }
+
+    delete_callbacks_for_context(scp);
+
     sfree(scp);
 }
 
diff --git a/terminal.c b/terminal.c
index 242207cc..d64c15bd 100644
--- a/terminal.c
+++ b/terminal.c
@@ -1804,6 +1804,7 @@ void term_free(Terminal *term)
     sfree(term->tabs);
 
     expire_timer_context(term);
+    delete_callbacks_for_context(term);
 
     conf_free(term->conf);
 
diff --git a/windows/winhsock.c b/windows/winhsock.c
index 5bbcfc2c..7f2b4474 100644
--- a/windows/winhsock.c
+++ b/windows/winhsock.c
@@ -128,6 +128,8 @@ static void sk_handle_close(Socket *s)
         CloseHandle(hs->recv_H);
     bufchain_clear(&hs->inputdata);
 
+    delete_callbacks_for_context(hs);
+
     sfree(hs);
 }
 
diff --git a/windows/winnet.c b/windows/winnet.c
index a9680795..b8177ce2 100644
--- a/windows/winnet.c
+++ b/windows/winnet.c
@@ -1344,6 +1344,7 @@ static void sk_net_close(Socket *sock)
     p_closesocket(s->s);
     if (s->addr)
 	sk_addr_free(s->addr);
+    delete_callbacks_for_context(s);
     sfree(s);
 }