diff --git a/tools/metrics.py b/tools/metrics.py
index 25acb30f51..98291e25a9 100755
--- a/tools/metrics.py
+++ b/tools/metrics.py
@@ -65,7 +65,7 @@ port_data = {
     "s": PortData("stm32", "stm32", "build-PYBV10/firmware.elf", "BOARD=PYBV10"),
     "c": PortData("cc3200", "cc3200", "build/WIPY/release/application.axf", "BTARGET=application"),
     "8": PortData("esp8266", "esp8266", "build-GENERIC/firmware.elf"),
-    "3": PortData("esp32", "esp32", "build-GENERIC/application.elf"),
+    "3": PortData("esp32", "esp32", "build-GENERIC/micropython.elf"),
     "r": PortData("nrf", "nrf", "build-pca10040/firmware.elf"),
     "d": PortData("samd", "samd", "build-ADAFRUIT_ITSYBITSY_M4_EXPRESS/firmware.elf"),
 }