diff --git a/src/system/arduino/esp32/system.c b/src/system/arduino/esp32/system.c
index d0c1c42d3..5d1736626 100644
--- a/src/system/arduino/esp32/system.c
+++ b/src/system/arduino/esp32/system.c
@@ -15,6 +15,7 @@
 #include <Arduino.h>
 #include <esp_heap_caps.h>
 #include <esp_random.h>
+#include <errno.h>
 #include <stddef.h>
 #include <sys/time.h>
 
diff --git a/src/system/espidf/system.c b/src/system/espidf/system.c
index 5acc72ff1..b6703178e 100644
--- a/src/system/espidf/system.c
+++ b/src/system/espidf/system.c
@@ -14,6 +14,7 @@
 
 #include <esp_heap_caps.h>
 #include <esp_random.h>
+#include <errno.h>
 #include <stddef.h>
 #include <sys/time.h>
 
diff --git a/src/system/zephyr/system.c b/src/system/zephyr/system.c
index 6b36e01f3..f808d908a 100644
--- a/src/system/zephyr/system.c
+++ b/src/system/zephyr/system.c
@@ -20,6 +20,7 @@
 #include <zephyr/random/random.h>
 #endif
 
+#include <errno.h>
 #include <stddef.h>
 #include <sys/time.h>
 #include <unistd.h>