diff --git a/.gitignore b/.gitignore
index ad84f13..f23a165 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-/slang-2.3.0.tar.bz2
+/slang-2.3.1.tar.bz2
diff --git a/slang-dupdeclaration.patch b/slang-dupdeclaration.patch
deleted file mode 100644
index e7d27b5..0000000
--- a/slang-dupdeclaration.patch
+++ /dev/null
@@ -1,18 +0,0 @@
-commit e3130695cec1e0fb3144e2f44040a254bebc08e4
-Author: John E. Davis <jed@jedsoft.org>
-Date:   Mon Feb 2 10:22:43 2015 -0500
-
-    pre2.3.1-17: remove duplicate prototype for SLrline_get_update_client_data from slang.h
-
-diff --git a/src/slang.h b/src/slang.h
-index 7df1552..0356370 100644
---- a/src/slang.h
-+++ b/src/slang.h
-@@ -1624,7 +1624,6 @@ SL_EXTERN int SLrline_set_update_hook (SLrline_Type *,
- 				    VOID_STAR client_data);
- /* free update_hook client_data */
- SL_EXTERN void SLrline_set_free_update_cb (SLrline_Type *, void (*)(SLrline_Type *, VOID_STAR));
--SL_EXTERN int SLrline_get_update_client_data (SLrline_Type *, VOID_STAR *);
- 
- /* These functions are passed a pointer to the update_hook client_data */
- SL_EXTERN void SLrline_set_update_clear_cb(SLrline_Type *, void (*)(SLrline_Type *, VOID_STAR));
diff --git a/slang.spec b/slang.spec
index 6631f48..a3f874d 100644
--- a/slang.spec
+++ b/slang.spec
@@ -7,7 +7,7 @@
 
 Summary: The shared library for the S-Lang extension language
 Name: slang
-Version: 2.3.0
+Version: 2.3.1
 Release: 7%{?dist}
 License: GPLv2+
 Group: System Environment/Libraries
@@ -16,8 +16,6 @@ Source: http://www.jedsoft.org/releases/%{name}/%{name}-%{version}.tar.bz2
 Patch1: slang-2.2.4-perms.patch
 # disable test that fails with SIGHUP ignored (e.g. in koji)
 Patch2: slang-sighuptest.patch
-# remove duplicate declaration in slang.h
-Patch3: slang-dupdeclaration.patch
 URL: http://www.jedsoft.org/slang/
 BuildRequires: libpng-devel pcre-devel zlib-devel
 %{?with_oniguruma:BuildRequires: oniguruma-devel}
@@ -70,7 +68,6 @@ language.
 %setup -q
 %patch1 -p1 -b .perms
 %patch2 -p1 -b .sighuptest
-%patch3 -p1 -b .dupdeclaration
 
 head -n -1800 < changes.txt > changes.txt_ && tail -n 1800 < changes.txt | \
 	iconv -f iso8859-1 -t utf8 >> changes.txt_ && \
diff --git a/sources b/sources
index f6f177d..f965e76 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-3bcc790460d52db1316c20395b7ac2f1  slang-2.3.0.tar.bz2
+bd46d1dc17a50c72004ad842829d7b1f  slang-2.3.1.tar.bz2