diff --git a/libpixelflinger/codeflinger/disassem.c b/libpixelflinger/codeflinger/disassem.c
index ee5e63a..c17f3ec 100644
--- a/libpixelflinger/codeflinger/disassem.c
+++ b/libpixelflinger/codeflinger/disassem.c
@@ -278,7 +278,7 @@
 
 #define insn_condition(x)	arm32_insn_conditions[(x >> 28) & 0x0f]
 #define insn_blktrans(x)	insn_block_transfers[(x >> 23) & 3]
-#define insn_stkblktrans(x)	insn_stack_block_transfers[(x >> 23) & 3]
+#define insn_stkblktrans(x)	insn_stack_block_transfers[(3*((x >> 20)&1))^((x >> 23)&3)]
 #define op2_shift(x)		op_shifts[(x >> 5) & 3]
 #define insn_fparnd(x)		insn_fpa_rounding[(x >> 5) & 0x03]
 #define insn_fpaprec(x)		insn_fpa_precision[(((x >> 18) & 2)|(x >> 7)) & 1]