diff --git a/lib/kmi/Makefile b/lib/kmi/Makefile
index a20f006d3..ec0de10c8 100644
--- a/lib/kmi/Makefile
+++ b/lib/kmi/Makefile
@@ -5,7 +5,7 @@ MAJOR_VER=1
 MINOR_VER=0
 BUGFIX_VER=0
 ## uncomment next line for using system malloc with MI
-#DEFS+= -DMI_SYSTEM_MALLOC
+DEFS+= -DMI_SYSTEM_MALLOC
 LIBS=
 
 include ../../Makefile.libs