1 files changed, 6 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128/e_lgammal_r.c b/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
index b9302974c0..d080448476 100644
--- a/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
+++ b/sysdeps/ieee754/ldbl-128/e_lgammal_r.c
@@ -772,6 +772,12 @@ __ieee754_lgammal_r (x, signgamp)
   if (! __finitel (x))
     return x * x;
 
+  if (x == 0.0L)
+    {
+      if (__signbitl (x))
+        *signgamp = -1;
+    }
+
   if (x < 0.0L)
     {
       q = -x;