diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9b8621e767b..8898e8de95f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2014-05-27  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* double-int.c (div_and_round_double) <ROUND_DIV_EXPR>: Use the proper
+	predicate to detect a negative quotient.
+
 2014-05-27  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* fold-const.c (fold_comparison): Clean up and extend X +- C1 CMP C2
diff --git a/gcc/double-int.c b/gcc/double-int.c
index 454655d9049..f6e340bebfe 100644
--- a/gcc/double-int.c
+++ b/gcc/double-int.c
@@ -588,7 +588,7 @@ div_and_round_double (unsigned code, int uns,
 		 == (unsigned HOST_WIDE_INT) htwice)
 		&& (labs_den <= ltwice)))
 	  {
-	    if (*hquo < 0)
+	    if (quo_neg)
 	      /* quo = quo - 1;  */
 	      add_double (*lquo, *hquo,
 			  (HOST_WIDE_INT) -1, (HOST_WIDE_INT) -1, lquo, hquo);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index cb8577a3560..d24b31eae60 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2014-05-27  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/overflow_fixed.adb: New test.
+
 2014-05-27  Marek Polacek  <polacek@redhat.com>
 
 	PR c/56724
diff --git a/gcc/testsuite/gnat.dg/overflow_fixed.adb b/gcc/testsuite/gnat.dg/overflow_fixed.adb
new file mode 100644
index 00000000000..6ece5152333
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/overflow_fixed.adb
@@ -0,0 +1,19 @@
+-- { dg-do run }
+-- { dg-options "-gnato -O" }
+
+procedure Overflow_Fixed is
+
+  type Unsigned_8_Bit is mod 2**8;
+
+  procedure Fixed_To_Eight (Value : Duration) is
+    Item : Unsigned_8_Bit;
+  begin
+    Item := Unsigned_8_Bit(Value);
+    raise Program_Error;
+  exception
+    when Constraint_Error => null; -- expected case
+  end;
+
+begin
+  Fixed_To_Eight (-0.5);
+end;