diff --git a/make/js.mk b/make/js.mk
index c737c714..6b474d74 100644
--- a/make/js.mk
+++ b/make/js.mk
@@ -14,7 +14,7 @@ JS_MINIFY             ?= $(JS_MINIFY_EXE) $(JS_MINIFY_OPTS)
 # This is not nice. It requires install-files to be included from elsewhere,
 # which is not obvious. OTOH, if it isn't, SOURCE_FILES doesn't do any harm,
 # either.
-SOURCE_FILES      += $(JS_GENERATED)
+SOURCE_FILES           += $(JS_GENERATED)
 
 all: $(JS_GENERATED)
 clean: minify.clean