diff --git a/tools/ci/check_grep.sh b/tools/ci/check_grep.sh
index 05718cfccd885..0774e8817d39b 100644
--- a/tools/ci/check_grep.sh
+++ b/tools/ci/check_grep.sh
@@ -125,6 +125,14 @@ if $grep 'allocate\(/mob/living/carbon/human[,\)]' $unit_test_files ||
 	st=1
 fi;
 
+section "516 Href Styles"
+part "byond href styles"
+if $grep "href[\s='\"\\]*\?" $code_files ; then
+    echo
+    echo -e "${RED}ERROR: BYOND requires internal href links to begin with \"byond://\".${NC}"
+    st=1
+fi;
+
 section "common mistakes"
 part "global vars"
 if $grep '^/*var/' $code_files; then