diff --git a/make/gettext.mk b/make/gettext.mk
index b69088c3..f0a71509 100644
--- a/make/gettext.mk
+++ b/make/gettext.mk
@@ -12,7 +12,7 @@ GETTEXT_MO ?= $(patsubst %.po,%.mo,$(GETTEXT_PO))
 GETTEXT_INPUT_DIRS ?= $(wildcard $(TOPDIR)/tools $(TOPDIR)/src $(TOPDIR)/conf)
 GETTEXT_INPUT_FILES ?= $(foreach d,$(GETTEXT_INPUT_DIRS),\
 	$(shell find $d -name '*.php' -o -name '*.cpp' -o -name '*.conf'))
-GETTEXT_KEYWORDS ?= htr ehtr
+GETTEXT_KEYWORDS ?= htr ehtr $(GETTEXT_EXTRA_KEYWORDS)
 
 all: $(GETTEXT_MO)
 clean: clean-mo