diff --git a/ueforth/Makefile b/ueforth/Makefile
index f494810..9cf526f 100644
--- a/ueforth/Makefile
+++ b/ueforth/Makefile
@@ -140,7 +140,7 @@ win32_tests: unit_tests_win32
 win64_tests: unit_tests_win64
 web_tests:
 esp32_tests:
-esp32_sim_tests: unit_tests_esp32_sim see_all_test_esp32_sim
+esp32_sim_tests: unit_tests_esp32_sim see_all_test_esp32_sim sizes
 
 # ---- UNIT TESTS ----
 
@@ -171,6 +171,9 @@ save_restore_test: $(POSIX)/ueforth
 	echo ': square dup * ; save /tmp/save_restore_test.bin bye' | $< >/dev/null
 	echo 'restore /tmp/save_restore_test.bin 4 square 16 - posix sysexit' | $< >/dev/null
 
+sizes: $(ESP32_SIM)/Esp32forth-sim
+	echo internals size-all bye | $< | tools/memuse.py >$(ESP32_SIM)/sizes.txt
+
 # ---- GENERATED ----
 
 $(GEN):
@@ -368,9 +371,6 @@ $(ESP32_SIM)/Esp32forth-sim: \
 	$(CXX) $(CFLAGS) -m32 -D_FILE_OFFSET_BITS=64 $< -o $@
 	strip $(STRIP_ARGS) $@
 
-sizes: $(ESP32_SIM)/Esp32forth-sim
-	echo internals size-all bye | $< | tools/memuse.py
-
 # ---- ESP32 ----
 
 esp32: esp32_target esp32_sim esp32_tests esp32_sim_tests