diff --git a/makefile.nanorc b/makefile.nanorc
index 70c6398..12db1e2 100644
--- a/makefile.nanorc
+++ b/makefile.nanorc
@@ -4,6 +4,7 @@ header "^#!.*/(env +)?[bg]?make( |$)"
 color cyan  "\<(ifeq|ifdef|ifneq|ifndef|else|endif)\>"
 color cyan  "^(export|include|override)\>"
 color brightmagenta  "^[^:=	]+:"
+color brightmagenta  "^[^:+	]+\+"
 color red "[=,%]" "\+=|\?=|:=|&&|\|\|"
 color brightblue "\$\((abspath|addprefix|addsuffix|and|basename|call|dir)[[:space:]]"
 color brightblue "\$\((error|eval|filter|filter-out|findstring|firstword)[[:space:]]"