diff --git a/mold.changes b/mold.changes
index c18230b..c44a744 100644
--- a/mold.changes
+++ b/mold.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Jan 31 10:24:17 UTC 2022 - Martin Liška <mliska@suse.cz>
+
+- Start using system library mimalloc.
+
 -------------------------------------------------------------------
 Sun Jan 30 15:53:00 UTC 2022 - Martin Liška <mliska@suse.cz>
 
diff --git a/mold.spec b/mold.spec
index 62b0b9d..7fa4cd5 100644
--- a/mold.spec
+++ b/mold.spec
@@ -30,9 +30,10 @@ BuildRequires:  tbb-devel
 BuildRequires:  tbb-devel
 BuildRequires:  xxhash-devel
 BuildRequires:  zlib-devel
+BuildRequires:  mimalloc-devel
 PreReq:         update-alternatives
 
-%define build_args SYSTEM_TBB=1 SYSTEM_XXHASH=1
+%define build_args SYSTEM_TBB=1 SYSTEM_XXHASH=1 SYSTEM_MIMALLOC=1
 
 %description
 mold is a faster drop-in replacement for existing Unix linkers.