diff --git a/ChangeLog b/ChangeLog
index 723c4665f..15ea3a63b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2011-07-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
+
+	-e means we expect an accepting run.
+
+	* iface/dve2/dve2check.cc: Reverse the value of
+	expect_counter_example with respect to the -e/-E options.
+	* iface/dve2/dve2check.test: Swap -e and -E.
+
 2011-06-26  Alexandre Duret-Lutz  <adl@lrde.epita.fr>
 
 	Add some "drop shadow" in ltl2tgba.html.
diff --git a/iface/dve2/dve2check.cc b/iface/dve2/dve2check.cc
index f7512d957..c47a191b4 100644
--- a/iface/dve2/dve2check.cc
+++ b/iface/dve2/dve2check.cc
@@ -107,7 +107,7 @@ main(int argc, char **argv)
 		if (!*echeck_algo)
 		  echeck_algo = "Cou99";
 
-		expect_counter_example = (*opt == 'E');
+		expect_counter_example = (*opt == 'e');
 		output = EmptinessCheck;
 		break;
 	      }
diff --git a/iface/dve2/dve2check.test b/iface/dve2/dve2check.test
index 036f8e965..50aabaf06 100755
--- a/iface/dve2/dve2check.test
+++ b/iface/dve2/dve2check.test
@@ -39,15 +39,15 @@ for opt in '' '-z'; do
   # (Don't run the first one using "run 0" because it would take too much
   # time with valgrind.).
 
-  ../dve2check $opt -e $srcdir/beem-peterson.4.dve \
+  ../dve2check $opt -E $srcdir/beem-peterson.4.dve \
     '!GF(P_0.CS|P_1.CS|P_2.CS|P_3.CS)'
-  run 0 ../dve2check $opt -E $srcdir/beem-peterson.4.dve \
+  run 0 ../dve2check $opt -e $srcdir/beem-peterson.4.dve \
     '!G(P_0.wait -> F P_0.CS)' > stdout1
   # same formula, different syntax.
-  run 0 ../dve2check $opt -E $srcdir/beem-peterson.4.dve \
+  run 0 ../dve2check $opt -e $srcdir/beem-peterson.4.dve \
 	    '!G("P_0 == wait" -> F "P_0 == CS")' > stdout2
   cmp stdout1 stdout2
-  run 0 ../dve2check $opt -E $srcdir/beem-peterson.4.dve '!G("pos[1] < 3")'
+  run 0 ../dve2check $opt -e $srcdir/beem-peterson.4.dve '!G("pos[1] < 3")'
 done
 
 # Now check some error messages.