diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc
index c60b999aa3..bbc3b70fa9 100644
--- a/fpu/softfloat-specialize.c.inc
+++ b/fpu/softfloat-specialize.c.inc
@@ -402,10 +402,10 @@ static int pickNaN(FloatClass a_cls, FloatClass b_cls,
         /* target didn't set the rule: fall back to old ifdef choices */
 #if defined(TARGET_AVR) || defined(TARGET_HEXAGON) \
     || defined(TARGET_RISCV) || defined(TARGET_SH4) \
-    || defined(TARGET_TRICORE) || defined(TARGET_ARM) || defined(TARGET_MIPS)
+    || defined(TARGET_TRICORE) || defined(TARGET_ARM) || defined(TARGET_MIPS) \
+    || defined(TARGET_LOONGARCH64)
         g_assert_not_reached();
-#elif defined(TARGET_HPPA) || \
-    defined(TARGET_LOONGARCH64) || defined(TARGET_S390X)
+#elif defined(TARGET_HPPA) || defined(TARGET_S390X)
         rule = float_2nan_prop_s_ab;
 #elif defined(TARGET_PPC) || defined(TARGET_M68K)
         /*
diff --git a/target/loongarch/tcg/fpu_helper.c b/target/loongarch/tcg/fpu_helper.c
index f6753c5875..21bc3b04a9 100644
--- a/target/loongarch/tcg/fpu_helper.c
+++ b/target/loongarch/tcg/fpu_helper.c
@@ -31,6 +31,7 @@ void restore_fp_status(CPULoongArchState *env)
     set_float_rounding_mode(ieee_rm[(env->fcsr0 >> FCSR0_RM) & 0x3],
                             &env->fp_status);
     set_flush_to_zero(0, &env->fp_status);
+    set_float_2nan_prop_rule(float_2nan_prop_s_ab, &env->fp_status);
 }
 
 int ieee_ex_to_loongarch(int xcpt)