diff --git a/compiler-rt/lib/builtins/fp_fixint_impl.inc b/compiler-rt/lib/builtins/fp_fixint_impl.inc
index 2196d712f05f6..3556bad9990b2 100644
--- a/compiler-rt/lib/builtins/fp_fixint_impl.inc
+++ b/compiler-rt/lib/builtins/fp_fixint_impl.inc
@@ -36,5 +36,5 @@ static __inline fixint_t __fixint(fp_t a) {
   if (exponent < significandBits)
     return sign * (significand >> (significandBits - exponent));
   else
-    return sign * ((fixint_t)significand << (exponent - significandBits));
+    return sign * ((fixuint_t)significand << (exponent - significandBits));
 }
diff --git a/compiler-rt/test/builtins/Unit/fixsfdi_test.c b/compiler-rt/test/builtins/Unit/fixsfdi_test.c
index 811c5ff426441..7dd28a25fd5ac 100644
--- a/compiler-rt/test/builtins/Unit/fixsfdi_test.c
+++ b/compiler-rt/test/builtins/Unit/fixsfdi_test.c
@@ -70,5 +70,8 @@ int main()
     if (test__fixsfdi(-0x1.FFFFFCp+62F, 0x8000010000000000LL))
         return 1;
 
-   return 0;
+    if (test__fixsfdi(-0x8000000000000000.0p+0F, 0x8000000000000000LL))
+        return 1;
+
+    return 0;
 }