diff --git a/libproxy-pacrunner-crash-fix.patch b/libproxy-pacrunner-crash-fix.patch
new file mode 100644
index 0000000..b9ea8ab
--- /dev/null
+++ b/libproxy-pacrunner-crash-fix.patch
@@ -0,0 +1,12 @@
+diff -up libproxy-0.4.11/libproxy/extension_pacrunner.cpp.mozjscrash libproxy-0.4.11/libproxy/extension_pacrunner.cpp
+--- libproxy-0.4.11/libproxy/extension_pacrunner.cpp.mozjscrash	2010-07-29 08:14:59.000000000 -0400
++++ libproxy-0.4.11/libproxy/extension_pacrunner.cpp	2013-09-19 09:22:13.031263766 -0400
+@@ -35,6 +35,7 @@ pacrunner* pacrunner_extension::get(stri
+ 		if (this->last == pac)
+ 			return this->pr;
+ 		delete this->pr;
++		this->pr = NULL;
+ 	}
+ 
+ 	return this->pr = this->create(pac, pacurl);
+diff -up libproxy-0.4.11/libproxy/modules/pacrunner_mozjs.cpp.mozjscrash libproxy-0.4.11/libproxy/modules/pacrunner_mozjs.cpp
diff --git a/libproxy.spec b/libproxy.spec
index 0bf9ece..124c495 100644
--- a/libproxy.spec
+++ b/libproxy.spec
@@ -15,6 +15,7 @@ Source0:        https://github.com/libproxy/%{name}/archive/%{version}.tar.gz
 Source1:        proxy.1
 # http://code.google.com/p/libproxy/issues/detail?id=152
 Patch0:         0001-Add-config-module-for-querying-PacRunner-d-mon.patch
+Patch1:         libproxy-pacrunner-crash-fix.patch
 
 BuildRequires:  libmodman-devel >= 2.0.1
 BuildRequires:  cmake >= 2.6.0
@@ -242,6 +243,7 @@ make test
 %changelog
 * Thu Jul 13 2017 David King <amigadave@amigadave.com> - 0.4.15-2
 - Use pkgconfig for BuildRequires
+- Fix crash in pacrunner module (#1459779)
 
 * Tue May 16 2017 Peter Robinson <pbrobinson@fedoraproject.org> 0.4.15-1
 - Update to 0.4.15