diff --git a/ghostscript-gs_sprintf.patch b/ghostscript-gs_sprintf.patch
index 5e123e1..feb2d5b 100644
--- a/ghostscript-gs_sprintf.patch
+++ b/ghostscript-gs_sprintf.patch
@@ -28429,3 +28429,19 @@ diff -up ghostscript-9.07/trio/triostr.h.gs_sprintf ghostscript-9.07/trio/triost
 +#endif
 +
 +#endif /* TRIO_TRIOSTR_H */
+--- ghostscript-9.07/base/stdio_.h.gs_sprintf	2013-07-17 15:09:26.756919462 +0100
++++ ghostscript-9.07/base/stdio_.h	2013-07-17 15:10:10.428097610 +0100
+@@ -77,4 +77,13 @@ int unlink(const char *);
+ int snprintf(char *buffer, size_t count, const char *format , ...);
+ #endif
+ 
++/* for our non-localizing (v)s(n)printf() functions */
++/* only *really* required for floating point conversions */
++#include "gssprintf.h"
++
++#ifndef sprintf
++#define sprintf DO_NOT_USE_SPRINTF
++#endif
++
++
+ #endif /* stdio__INCLUDED */
diff --git a/ghostscript.spec b/ghostscript.spec
index 431bcfb..685a373 100644
--- a/ghostscript.spec
+++ b/ghostscript.spec
@@ -5,7 +5,7 @@ Summary: A PostScript interpreter and renderer
 Name: ghostscript
 Version: %{gs_ver}
 
-Release: 9%{?dist}
+Release: 10%{?dist}
 
 # Included CMap data is Redistributable, no modification permitted,
 # see http://bugzilla.redhat.com/487510
@@ -357,6 +357,11 @@ rm -rf $RPM_BUILD_ROOT
 %{_libdir}/libgs.so
 
 %changelog
+* Wed Jul 17 2013 Tim Waugh <twaugh@redhat.com> 9.07-10
+- Added in missing part of gs_sprintf backport: add in the header to
+  stdio_.h. Without this there are problems with va_args on some
+  platforms (bug #979681).
+
 * Mon Jul  8 2013 Tim Waugh <twaugh@redhat.com> 9.07-9
 - Upstream patch from bug #693921 to avoid zfapi crash (bug #969785).