diff --git a/ChangeLog b/ChangeLog
index 52a1b7a9..3e2b95b2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2003-03-29  Akim Demaille  <akim@epita.fr>
+
+	* m4/error.m4: Do not put under dynamic conditions some code which
+	expansion is under static control.
+
 2003-03-29  Akim Demaille  <akim@epita.fr>
 
 	* doc/bison.texinfo (How Can I Reset @code{yyparse}): New.
diff --git a/m4/error.m4 b/m4/error.m4
index 99e9cf00..560ca8fb 100644
--- a/m4/error.m4
+++ b/m4/error.m4
@@ -1,12 +1,10 @@
-#serial 5
+#serial 6
 
 AC_DEFUN([gl_ERROR],
 [
   AC_FUNC_ERROR_AT_LINE
   dnl Note: AC_FUNC_ERROR_AT_LINE does AC_LIBSOURCES([error.h, error.c]).
-  if test $ac_cv_lib_error_at_line = no; then
-    jm_PREREQ_ERROR
-  fi
+  jm_PREREQ_ERROR
 ])
 
 # Prerequisites of lib/error.c.