diff --git a/reactos/include/crt/setjmp.h b/reactos/include/crt/setjmp.h
index 2a64a9b7c17..002e525c050 100644
--- a/reactos/include/crt/setjmp.h
+++ b/reactos/include/crt/setjmp.h
@@ -129,6 +129,15 @@ extern "C" {
     SETJMP_FLOAT128 Xmm15;
   } _JUMP_BUFFER;
 
+#elif defined(_M_ARM)
+
+#define _JBLEN  11
+#define _JBTYPE int
+
+#else
+
+#error Define Setjmp for this architecture!
+
 #endif
 
 #ifndef _JMP_BUF_DEFINED