diff --git a/target-i386/exec.h b/target-i386/exec.h
index 8299af4e7..4ff527f84 100644
--- a/target-i386/exec.h
+++ b/target-i386/exec.h
@@ -187,6 +187,7 @@ void helper_imulq_EAX_T0(void);
 void helper_imulq_T0_T1(void);
 void helper_divq_EAX_T0(void);
 void helper_idivq_EAX_T0(void);
+void helper_bswapq_T0(void);
 void helper_cmpxchg8b(void);
 void helper_cpuid(void);
 void helper_enter_level(int level, int data32);
diff --git a/target-i386/helper.c b/target-i386/helper.c
index 7bd545e81..123f51049 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -3395,6 +3395,10 @@ void helper_idivq_EAX_T0(void)
     EDX = r1;
 }
 
+void helper_bswapq_T0(void)
+{
+    T0 = bswap64(T0);
+}
 #endif
 
 float approx_rsqrt(float a)
diff --git a/target-i386/op.c b/target-i386/op.c
index 20eeaa440..a9a8665a1 100644
--- a/target-i386/op.c
+++ b/target-i386/op.c
@@ -225,7 +225,7 @@ void OPPROTO op_bswapl_T0(void)
 #ifdef TARGET_X86_64
 void OPPROTO op_bswapq_T0(void)
 {
-    T0 = bswap64(T0);
+    helper_bswapq_T0();
 }
 #endif