diff --git a/Makefile.defs b/Makefile.defs
index 9d68c4bf771..8205bcd5823 100644
--- a/Makefile.defs
+++ b/Makefile.defs
@@ -103,7 +103,7 @@ EXTRAVERSION =
 # 0 - f_malloc (fast malloc)
 # 1 - q_malloc (quick malloc)
 # 2 - tlsf_malloc (O(1) malloc and free)
-MEMMNG ?= 0
+MEMMNG ?= 1
 # memory debugger switcher
 # 0 - off (no-debug mode)
 # 1 - on (debug mode)