diff --git a/make/defs.mk b/make/defs.mk
index 7d353923..60ff1eff 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -198,6 +198,8 @@ BUILD_CFLAGS          += -D_FILE_OFFSET_BITS=64 -Wall -Wno-unused-value -fexcept
 BUILD_CPPFLAGS        += -D_FILE_OFFSET_BITS=64 -Wall -Wno-unused-value -Wno-deprecated -DPROJECT_STR=\"$(PROJECT)\"
 BUILD_LDFLAGS         += -Wall
 
+LOG_QUAL_PREFIX       ?= $(LOGID):
+
 ifneq ($(LOG_QUAL_PREFIX),)
 PROJECT_CFLAGS      += -DKEEP_FILES_OPEN -DLOG_QUAL_PREFIX=\"$(LOG_QUAL_PREFIX)\"
 PROJECT_CPPFLAGS    += -DKEEP_FILES_OPEN -DLOG_QUAL_PREFIX=\"$(LOG_QUAL_PREFIX)\"