diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index 017c779b28..6420a1bee5 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -1018,7 +1018,7 @@ class esp32(Board):
         # this makes sure we get the correct subtype
         env.DEFINES.update(
             CONFIG_HAL_BOARD_SUBTYPE = 'HAL_BOARD_SUBTYPE_ESP32_%s' %  tt.upper() ,
-            HAL_HAVE_HARDWARE_DOUBLE = '1',
+            HAL_HAVE_HARDWARE_DOUBLE = '0',
         )
 
         if self.name.endswith("empty"):