diff --git a/target/i386/gdbstub.c b/target/i386/gdbstub.c
index 098a2ad15a..c3a2cf6f28 100644
--- a/target/i386/gdbstub.c
+++ b/target/i386/gdbstub.c
@@ -129,8 +129,8 @@ int x86_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
         n -= IDX_XMM_REGS;
         if (n < CPU_NB_REGS32 || TARGET_LONG_BITS == 64) {
             return gdb_get_reg128(mem_buf,
-                                  env->xmm_regs[n].ZMM_Q(0),
-                                  env->xmm_regs[n].ZMM_Q(1));
+                                  env->xmm_regs[n].ZMM_Q(1),
+                                  env->xmm_regs[n].ZMM_Q(0));
         }
     } else {
         switch (n) {