diff --git a/Modules/CMakeDetermineASMCompiler.cmake b/Modules/CMakeDetermineASMCompiler.cmake
index fb005ffe3d..a48d33c6c2 100644
--- a/Modules/CMakeDetermineASMCompiler.cmake
+++ b/Modules/CMakeDetermineASMCompiler.cmake
@@ -145,7 +145,7 @@ if(CMAKE_ASM${ASM_DIALECT}_COMPILER_ID)
   else()
     set(_version "")
   endif()
-  if(CMAKE_ASM${ASM_DIALECT}_COMPILER_ARCHITECTURE_ID)
+  if(CMAKE_ASM${ASM_DIALECT}_COMPILER_ARCHITECTURE_ID AND "x${CMAKE_ASM${ASM_DIALECT}_COMPILER_ID}" STREQUAL "xIAR")
     set(_archid " ${CMAKE_ASM${ASM_DIALECT}_COMPILER_ARCHITECTURE_ID}")
   else()
     set(_archid "")
diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index 7036b93000..2321e11d8c 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -143,7 +143,7 @@ function(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
     else()
       set(_version "")
     endif()
-    if(CMAKE_${lang}_COMPILER_ARCHITECTURE_ID)
+    if(CMAKE_${lang}_COMPILER_ARCHITECTURE_ID AND "x${CMAKE_${lang}_COMPILER_ID}" STREQUAL "xIAR")
       set(_archid " ${CMAKE_${lang}_COMPILER_ARCHITECTURE_ID}")
     else()
       set(_archid "")