diff --git a/CMakeLists.txt b/CMakeLists.txt
index 556a8db..c4b387c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -118,7 +118,7 @@ if(USE_MIMALLOC)
         GIT_TAG v2.2.4
         PREFIX ${MIMALLOC_PREFIX}
         CMAKE_ARGS
-            -DCMAKE_BUILD_TYPE=$<CONFIG>
+            -DCMAKE_BUILD_TYPE=Release
             -DMI_BUILD_SHARED=ON
             -DMI_BUILD_STATIC=OFF
             -DMI_BUILD_TESTS=OFF