diff --git a/asm/emerald.s b/asm/emerald.s
index 7e5b63334..29f46a167 100644
--- a/asm/emerald.s
+++ b/asm/emerald.s
@@ -916424,7 +916424,7 @@ sub_81DB620: ; 81DB620
 	.include "asm/libgcnmultiboot.s"
 	.include "asm/libmks4agb.s"
 	.include "asm/libagbbackup.s"
-	.include "asm/unknown_lib_2.s"
+	.include "asm/librtc.s"
 	.include "asm/librfu.s"
 	.include "asm/libagbsyscall.s"
 	.include "asm/libgcc.s"
diff --git a/asm/unknown_lib_2.s b/asm/librtc.s
similarity index 100%
rename from asm/unknown_lib_2.s
rename to asm/librtc.s