diff --git a/src/gba/gba-bios.c b/src/gba/gba-bios.c
index a0dcdbb7a..df1de54ce 100644
--- a/src/gba/gba-bios.c
+++ b/src/gba/gba-bios.c
@@ -58,5 +58,5 @@ void GBASwi16(struct ARMBoard* board, int immediate) {
 }
 
 void GBASwi32(struct ARMBoard* board, int immediate) {
-	GBASwi32(board, immediate >> 8);
+	GBASwi32(board, immediate >> 16);
 }