diff --git a/kernel/CMakeLists.txt b/kernel/CMakeLists.txt
index 6d8d759ad..f0793bdef 100644
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@@ -187,10 +187,11 @@ function (build_core TARGET_CORE KDIR TSUFFIX KERNEL_DEFINITIONS)
     endif ()
     # Makefile.L3
     set(USE_TRMM false)
-    if (ARM OR ARM64 OR (TARGET_CORE MATCHES LONGSOON3B) OR (TARGET_CORE MATCHES GENERIC) OR (TARGET_CORE MATCHES HASWELL) OR (TARGET_CORE MATCHES ZEN) OR (TARGET_CORE MATCHES SKYLAKEX) OR (TARGET_CORE MATCHES COOPERLAKE))
+    string(TOUPPER ${TARGET_CORE} UC_TARGET_CORE)
+    if (ARM OR ARM64 OR (UC_TARGET_CORE MATCHES LONGSOON3B) OR (UC_TARGET_CORE MATCHES GENERIC) OR (UC_TARGET_CORE MATCHES HASWELL) OR (UC_TARGET_CORE MATCHES ZEN) OR (UC_TARGET_CORE MATCHES SKYLAKEX) OR (UC_TARGET_CORE MATCHES COOPERLAKE))
       set(USE_TRMM true)
     endif ()
-    if (ZARCH OR (TARGET_CORE MATCHES POWER8) OR (TARGET_CORE MATCHES POWER9) OR (TARGET_CORE MATCHES POWER10))
+    if (ZARCH OR (UC_TARGET_CORE MATCHES POWER8) OR (UC_TARGET_CORE MATCHES POWER9) OR (UC_TARGET_CORE MATCHES POWER10))
       set(USE_TRMM true)
     endif ()