diff --git a/platformio_tasmota_cenv_sample.ini b/platformio_tasmota_cenv_sample.ini
index b3344dedb..e8627645d 100644
--- a/platformio_tasmota_cenv_sample.ini
+++ b/platformio_tasmota_cenv_sample.ini
@@ -21,6 +21,8 @@ build_flags                 = ${esp82xx_defaults.build_flags}
 ; *** Use ONE of the two PWM variants. Tasmota default is Locked PWM
                               ;-DWAVEFORM_LOCKED_PHASE
                               -DWAVEFORM_LOCKED_PWM
+                              ; 16k extra heap https://github.com/esp8266/Arduino/pull/7060
+                              -DMMU_IRAM_SIZE=0xC000
                               -Wno-switch-unreachable