diff --git a/code/__DEFINES/is_helpers.dm b/code/__DEFINES/is_helpers.dm
index 9ecde198..5fd4ca88 100644
--- a/code/__DEFINES/is_helpers.dm
+++ b/code/__DEFINES/is_helpers.dm
@@ -81,6 +81,7 @@ GLOBAL_LIST_INIT(turfs_without_ground, typecacheof(list(
 
 // Citadel specific species
 #define isipcperson(A) (is_species(A, /datum/species/ipc))
+#define issynthliz(A) (is_species(A, /datum/species/synthliz))
 #define ismammal(A) (is_species(A, /datum/species/mammal))
 #define isavian(A) (is_species(A, /datum/species/avian))
 #define isaquatic(A) (is_species(A, /datum/species/aquatic))