diff --git a/src/include/lib/lib_24e40.h b/src/include/lib/lib_24e40.h
index cf04a4f18..b73d1e3e2 100644
--- a/src/include/lib/lib_24e40.h
+++ b/src/include/lib/lib_24e40.h
@@ -97,7 +97,7 @@ bool hasLineOfSight(struct coord *coord, s16 *room, struct coord *coord2, s16 *r
 bool func0002dcd0(struct coord *arg0, s16 *rooms1, struct coord *arg2, s16 *rooms2, u32 arg4);
 bool func0002dcfc(struct coord *pos, s16 *rooms, struct coord *pos2, s16 *rooms2, s16 *rooms3, u32 arg5, u32 arg6);
 s32 cdTestAToB4(struct coord *pos, s16 *rooms, struct coord *pos2, u32 types, u32 arg4);
-u32 func0002de10(void);
+s32 func0002de10(struct coord *pos, s16 *rooms, struct coord *pos2, u32 types);
 u32 func0002de34(void);
 u32 func0002deac(void);
 u32 func0002ded8(void);
diff --git a/src/lib/lib_24e40.c b/src/lib/lib_24e40.c
index e1924e6df..ad82df697 100644
--- a/src/lib/lib_24e40.c
+++ b/src/lib/lib_24e40.c
@@ -10076,18 +10076,10 @@ glabel cdTestAToB4
 /*    2de0c:	00000000 */ 	nop
 );
 
-GLOBAL_ASM(
-glabel func0002de10
-/*    2de10:	27bdffe0 */ 	addiu	$sp,$sp,-32
-/*    2de14:	afbf001c */ 	sw	$ra,0x1c($sp)
-/*    2de18:	240e001c */ 	addiu	$t6,$zero,0x1c
-/*    2de1c:	0c00b764 */ 	jal	cdTestAToB4
-/*    2de20:	afae0010 */ 	sw	$t6,0x10($sp)
-/*    2de24:	8fbf001c */ 	lw	$ra,0x1c($sp)
-/*    2de28:	27bd0020 */ 	addiu	$sp,$sp,0x20
-/*    2de2c:	03e00008 */ 	jr	$ra
-/*    2de30:	00000000 */ 	nop
-);
+s32 func0002de10(struct coord *pos, s16 *rooms, struct coord *pos2, u32 types)
+{
+	return cdTestAToB4(pos, rooms, pos2, types, 0x1c);
+}
 
 GLOBAL_ASM(
 glabel func0002de34