diff --git a/code/_globalvars/bitfields/declarations.dm b/code/_globalvars/bitfields/declarations.dm
index 2f56a6cb1816..c035da59e1da 100644
--- a/code/_globalvars/bitfields/declarations.dm
+++ b/code/_globalvars/bitfields/declarations.dm
@@ -30,39 +30,29 @@ DEFINE_BITFIELD(datum_flags, list(
 	"DF_USE_TAG" = DF_USE_TAG,
 ))
 
-DEFINE_BITFIELD(pass_flags, list(
-	"PASSTABLE" = PASSTABLE,
-	"PASSGLASS" = PASSGLASS,
-	"PASSGRILLE" = PASSGRILLE,
-	"PASSBLOB" = PASSBLOB,
-	"PASSMOB" = PASSMOB,
-	"LETPASSTHROW" = LETPASSTHROW,
-	"PASSMACHINE" = PASSMACHINE,
-	"PASSSTRUCTURE" = PASSSTRUCTURE,
-	"PASSFLAPS" = PASSFLAPS,
-	"PASSFENCE" = PASSFENCE,
-	"PASSDOOR" = PASSDOOR,
-	"PASSVEHICLE" = PASSVEHICLE,
-	"PASSITEM" = PASSITEM,
-	"LETPASSCLICKS" = LETPASSCLICKS,
-))
+#define PASS_FLAGS_LIST list( \
+	"PASSTABLE" = PASSTABLE, \
+	"PASSGLASS" = PASSGLASS, \
+	"PASSGRILLE" = PASSGRILLE, \
+	"PASSBLOB" = PASSBLOB, \
+	"PASSMOB" = PASSMOB, \
+	"LETPASSTHROW" = LETPASSTHROW, \
+	"PASSMACHINE" = PASSMACHINE, \
+	"PASSSTRUCTURE" = PASSSTRUCTURE, \
+	"PASSFLAPS" = PASSFLAPS, \
+	"PASSFENCE" = PASSFENCE, \
+	"PASSDOOR" = PASSDOOR, \
+	"PASSVEHICLE" = PASSVEHICLE, \
+	"PASSITEM" = PASSITEM, \
+	"PASSPROJECTILE" = PASSPROJECTILE, \
+	"LETPASSCLICKS" = LETPASSCLICKS, \
+)
 
-DEFINE_BITFIELD(pass_flags_self, list(
-	"PASSTABLE" = PASSTABLE,
-	"PASSGLASS" = PASSGLASS,
-	"PASSGRILLE" = PASSGRILLE,
-	"PASSBLOB" = PASSBLOB,
-	"PASSMOB" = PASSMOB,
-	"LETPASSTHROW" = LETPASSTHROW,
-	"PASSMACHINE" = PASSMACHINE,
-	"PASSSTRUCTURE" = PASSSTRUCTURE,
-	"PASSFLAPS" = PASSFLAPS,
-	"PASSFENCE" = PASSFENCE,
-	"PASSDOOR" = PASSDOOR,
-	"PASSVEHICLE" = PASSVEHICLE,
-	"PASSITEM" = PASSITEM,
-	"LETPASSCLICKS" = LETPASSCLICKS,
-))
+DEFINE_BITFIELD(pass_flags, PASS_FLAGS_LIST)
+
+DEFINE_BITFIELD(pass_flags_self, PASS_FLAGS_LIST)
+
+#undef PASS_FLAGS_LIST
 
 DEFINE_BITFIELD(gas_type, list(
 	"LINDA_SPAWN_HEAT" = LINDA_SPAWN_HEAT,