diff --git a/CMSIS/Core/Include/m-profile/cmsis_iccarm_m.h b/CMSIS/Core/Include/m-profile/cmsis_iccarm_m.h
index 4fe09f202..cfc6f8083 100644
--- a/CMSIS/Core/Include/m-profile/cmsis_iccarm_m.h
+++ b/CMSIS/Core/Include/m-profile/cmsis_iccarm_m.h
@@ -77,7 +77,7 @@
 
 /* Alternativ core deduction for older ICCARM's */
 #if !defined(__ARM_ARCH_6M__) && !defined(__ARM_ARCH_7M__) && !defined(__ARM_ARCH_7EM__) && \
-    !defined(__ARM_ARCH_8M_BASE__) && !defined(__ARM_ARCH_8M_MAIN__)
+    !defined(__ARM_ARCH_8M_BASE__) && !defined(__ARM_ARCH_8M_MAIN__) && !defined(__ARM_ARCH_8_1M_MAIN__)
   #if defined(__ARM6M__) && (__CORE__ == __ARM6M__)
     #define __ARM_ARCH_6M__ 1
   #elif defined(__ARM7M__) && (__CORE__ == __ARM7M__)
@@ -90,6 +90,8 @@
     #define __ARM_ARCH_8M_MAIN__ 1
   #elif defined(__ARM8EM_MAINLINE__) && (__CORE == __ARM8EM_MAINLINE__)
     #define __ARM_ARCH_8M_MAIN__ 1
+  #elif defined(__ARM_ARCH_PROFILE) && __ARM_ARCH_PROFILE == 'M' && __ARM_ARCH == 801
+    #define __ARM_ARCH_8_1M_MAIN__ 1
   #else
     #error "Unknown target."
   #endif