diff --git a/slang-dupdeclaration.patch b/slang-dupdeclaration.patch
new file mode 100644
index 0000000..e7d27b5
--- /dev/null
+++ b/slang-dupdeclaration.patch
@@ -0,0 +1,18 @@
+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 29866a7..97041c9 100644
--- a/slang.spec
+++ b/slang.spec
@@ -15,6 +15,8 @@ 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}
@@ -67,6 +69,7 @@ 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_ && \