diff --git a/platform.txt b/platform.txt
index 1ae01d2aacb..b25179cc168 100644
--- a/platform.txt
+++ b/platform.txt
@@ -3,7 +3,7 @@ version=0.0.1
 
 runtime.tools.xtensa-esp32-elf-gcc.path={runtime.platform.path}/tools/xtensa-esp32-elf
 
-tools.esptool.cmd="{runtime.platform.path}/tools/esptool"
+tools.esptool.cmd="{runtime.platform.path}/tools/esptool.py"
 tools.esptool.cmd.windows="{runtime.platform.path}/tools/esptool.exe"
 
 tools.gen_esp32part.cmd=python "{runtime.platform.path}/tools/gen_esp32part.py"