diff --git a/arch/arm/bits/signal.h b/arch/arm/bits/signal.h
index 213e5fc23b9d825205c62abc323b83fac9c879ef..4906b4825c289e661710f32eeb3c98b417638fd5 100644
--- a/arch/arm/bits/signal.h
+++ b/arch/arm/bits/signal.h
@@ -82,7 +82,6 @@ typedef struct __ucontext {
 #define SIGPWR    30
 #define SIGSYS    31
 #define SIGUNUSED SIGSYS
-#define SIGHOOK   36
-#define SIGUNHOOK 37
+
 
 #define _NSIG 65
diff --git a/porting/linux/user/include/signal.h b/porting/linux/user/include/signal.h
index 40b227a5a585706e881a77248d81e9b4e40d10db..41263918123d691f0609e9e8a1705c2749b5ca14 100644
--- a/porting/linux/user/include/signal.h
+++ b/porting/linux/user/include/signal.h
@@ -40,6 +40,8 @@ extern "C" {
 #define SI_QUEUE (-1)
 #define SI_USER 0
 #define SI_KERNEL 128
+#define SIGHOOK   36
+#define SIGUNHOOK 37
 
 typedef struct sigaltstack stack_t;