diff --git a/code/espurna/config/hardware.h b/code/espurna/config/hardware.h
index 907a292a..e6879ffb 100644
--- a/code/espurna/config/hardware.h
+++ b/code/espurna/config/hardware.h
@@ -2331,7 +2331,9 @@
 
     // Relays
     #define RELAY1_PIN          0
-    #define RELAY1_TYPE         RELAY_TYPE_NORMAL
+    #ifndef RELAY1_TYPE
+    #define RELAY1_TYPE         RELAY_TYPE_NORMAL   // See #1504 and #1554
+    #endif
 
     // LEDs
     #define LED1_PIN            2
diff --git a/code/platformio.ini b/code/platformio.ini
index 1bf9c6b6..a3eb8548 100644
--- a/code/platformio.ini
+++ b/code/platformio.ini
@@ -2541,6 +2541,17 @@ build_flags = ${common.build_flags_1m0m} -DGENERIC_ESP01S_RELAY_V40
 monitor_speed = ${common.monitor_speed}
 extra_scripts = ${common.extra_scripts}
 
+[env:generic-esp01s-relay-40-inv]
+platform = ${common.platform}
+framework = ${common.framework}
+board = ${common.board_1m}
+board_build.flash_mode = ${common.flash_mode}
+lib_deps = ${common.lib_deps}
+lib_ignore = ${common.lib_ignore}
+build_flags = ${common.build_flags_1m0m} -DGENERIC_ESP01S_RELAY_V40 -DRELAY1_TYPE=1
+monitor_speed = ${common.monitor_speed}
+extra_scripts = ${common.extra_scripts}
+
 [env:generic-esp01s-relay-40-ota]
 platform = ${common.platform}
 framework = ${common.framework}
@@ -2554,6 +2565,19 @@ upload_port = ${common.upload_port}
 upload_flags = ${common.upload_flags}
 extra_scripts = ${common.extra_scripts}
 
+[env:generic-esp01s-relay-40-inv-ota]
+platform = ${common.platform}
+framework = ${common.framework}
+board = ${common.board_1m}
+board_build.flash_mode = ${common.flash_mode}
+lib_deps = ${common.lib_deps}
+lib_ignore = ${common.lib_ignore}
+build_flags = ${common.build_flags_1m0m} -DGENERIC_ESP01S_RELAY_V40 -DRELAY1_TYPE=1
+upload_speed = ${common.upload_speed}
+upload_port = ${common.upload_port}
+upload_flags = ${common.upload_flags}
+extra_scripts = ${common.extra_scripts}
+
 [env:generic-esp01s-rgbled-10]
 platform = ${common.platform}
 framework = ${common.framework}