diff --git a/examples/stm32/nucleo-f429zi-freertos/mongoose_custom.h b/examples/stm32/nucleo-f429zi-freertos/mongoose_custom.h
index 53162794..6f0df4ff 100644
--- a/examples/stm32/nucleo-f429zi-freertos/mongoose_custom.h
+++ b/examples/stm32/nucleo-f429zi-freertos/mongoose_custom.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <errno.h>	// we are not using lwIP
-
 // See https://mongoose.ws/documentation/#build-options
 #define MG_ARCH MG_ARCH_FREERTOS
 #define MG_ENABLE_TCPIP 1
diff --git a/examples/stm32/nucleo-f746zg-freertos/mongoose_custom.h b/examples/stm32/nucleo-f746zg-freertos/mongoose_custom.h
index 53162794..6f0df4ff 100644
--- a/examples/stm32/nucleo-f746zg-freertos/mongoose_custom.h
+++ b/examples/stm32/nucleo-f746zg-freertos/mongoose_custom.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <errno.h>	// we are not using lwIP
-
 // See https://mongoose.ws/documentation/#build-options
 #define MG_ARCH MG_ARCH_FREERTOS
 #define MG_ENABLE_TCPIP 1
diff --git a/examples/ti/ek-tm4c1294xl-freertos/mongoose_custom.h b/examples/ti/ek-tm4c1294xl-freertos/mongoose_custom.h
index 96150766..4b2bdf97 100644
--- a/examples/ti/ek-tm4c1294xl-freertos/mongoose_custom.h
+++ b/examples/ti/ek-tm4c1294xl-freertos/mongoose_custom.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <errno.h>	// we are not using lwIP
-
 // See https://mongoose.ws/documentation/#build-options
 #define MG_ARCH MG_ARCH_FREERTOS
 #define MG_ENABLE_TCPIP 1