diff --git a/make/defs.mk b/make/defs.mk
index f26b0dfa..bb6bd351 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -613,6 +613,11 @@ ifeq ($(USE_TIMER),true)
 	BUILD_CPPFLAGS    += -D_USE_TIMER_
 endif
 
+ifeq ($(USE_FAST_LOG),false)
+	BUILD_CFLAGS      +=-D_USE_FAST_LOG_=0
+	BUILD_CPPFLAGS    +=-D_USE_FAST_LOG_=0
+endif
+
 ifeq ($(USE_GCOV),true)
 	BUILD_CFLAGS+= --coverage
 	BUILD_CPPFLAGS    += --coverage