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-rw-r--r--sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c b/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c
index 48098c18f6..420842e2d6 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c
@@ -194,6 +194,11 @@ __ieee754_gammal_r (long double x, int *signgamp)
 	      ret = M_PIl / (-x * sinpix
 			     * gammal_positive (-x, &exp2_adj));
 	      ret = __scalbnl (ret, -exp2_adj);
+	      if (ret < LDBL_MIN)
+		{
+		  long double force_underflow = ret * ret;
+		  math_force_eval (force_underflow);
+		}
 	    }
 	}
     }