diff --git a/firmware/asm/arm/thread.h b/firmware/asm/arm/thread.h
index ec9bbcb3cd..7b8ebc2041 100644
--- a/firmware/asm/arm/thread.h
+++ b/firmware/asm/arm/thread.h
@@ -30,6 +30,7 @@ struct regs
 };
 
 #if (CONFIG_PLATFORM & PLATFORM_HOSTED)
+  #include <errno.h>
   #define DEFAULT_STACK_SIZE 0x1000 /* Bytes */
 #else
   #define DEFAULT_STACK_SIZE 0x400  /* Bytes */