diff --git a/m4/ChangeLog b/m4/ChangeLog
index 56c20dfa8..b13bd4f20 100644
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,3 +1,8 @@
+2011-09-12  Werner Koch  <wk@g10code.com>
+
+	* libcurl.m4: Fix lost hash sign introduced by previous change.
+	Reported by John Marshall.
+
 2011-08-10  Werner Koch  <wk@g10code.com>
 
 	* readline.m4, libcurl.m4: Fix use of AC_LANG_PROGRAM.
diff --git a/m4/libcurl.m4 b/m4/libcurl.m4
index a0d258dae..7d1dbd302 100644
--- a/m4/libcurl.m4
+++ b/m4/libcurl.m4
@@ -141,7 +141,7 @@ AC_DEFUN([LIBCURL_CHECK_CONFIG],
            _libcurl_save_libs=$LIBS
            LIBS="$LIBCURL $LIBS"
 
-           AC_LINK_IFELSE([AC_LANG_PROGRAM([[include <curl/curl.h>]],[[
+           AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <curl/curl.h>]],[[
 /* Try and use a few common options to force a failure if we are
    missing symbols or cannot link. */
 int x;