diff --git a/toolchain_ARMCLANG.cmake b/toolchain_ARMCLANG.cmake
index 1c6d62d..8843484 100644
--- a/toolchain_ARMCLANG.cmake
+++ b/toolchain_ARMCLANG.cmake
@@ -52,7 +52,7 @@
     )
 endmacro()
 
-if(TFM_MEMORY_USAGE_QUIET)
+if(CONFIG_TFM_MEMORY_USAGE_QUIET)
     set(MEMORY_USAGE_FLAG "")
 else()
     set(MEMORY_USAGE_FLAG --info=summarysizes,sizes,totals,unused,veneers)