diff --git a/content/secu_logicielle/td5-stackoverflow_shellcode/files/q2/Makefile b/content/secu_logicielle/td5-stackoverflow_shellcode/files/q2/Makefile
index d1d8ad5..b84fc26 100644
--- a/content/secu_logicielle/td5-stackoverflow_shellcode/files/q2/Makefile
+++ b/content/secu_logicielle/td5-stackoverflow_shellcode/files/q2/Makefile
@@ -23,9 +23,17 @@ $(BUILD_DIR)/%: %.c
 build: $(addprefix $(BUILD_DIR)/, $(TGT)))
 
 
+PHONY: gdb_anodin
+gdb_anodin: build/anodin configure
+	PYTHONPATH=${PWD}/pframe${PYTHONPATH:+:${PYTHONPATH}} \
+		   setarch -R gdb ./$(BUILD_DIR)/anodin
 PHONY: gdb
+
 gdb: build/exploit build/anodin configure
-	echo '0x7fffffffe490' | ./$(BUILD_DIR)/exploit > hack.txt
+ifeq ($(A_ADDR),)
+	$(error A_ADDR must be defined, launch make gdb_anofin then run it)
+endif
+	echo '$(A_ADDR)' | ./$(BUILD_DIR)/exploit > hack.txt
 	PYTHONPATH=${PWD}/pframe${PYTHONPATH:+:${PYTHONPATH}} \
 			   setarch -R gdb ./$(BUILD_DIR)/anodin --command=anodin.gdb
 	rm hack.txt