diff --git a/Makefile.inc.in.patch b/Makefile.inc.in.patch
new file mode 100644
index 0000000..e3f25fa
--- /dev/null
+++ b/Makefile.inc.in.patch
@@ -0,0 +1,11 @@
+--- aegisub-3.2.2/Makefile.inc.in.orig	2015-06-29 14:44:02.998996223 +0100
++++ aegisub-3.2.2/Makefile.inc.in	2015-06-29 14:44:37.957948716 +0100
+@@ -28,7 +28,7 @@
+ CPPFLAGS            = @CPPFLAGS@
+ CFLAGS_DEP          = -MMD -MP
+ LIBS                = @LIBS@
+-LDFLAGS             = @LDFLAGS@
++LDFLAGS             = @LDFLAGS@ -pthread
+ INSTALL_FLAGS       = -m 644
+ LIB_SHARED_LINK     = -shared -Wl,-soname -Wl,$(LIB_SHARED_FULL)
+ LIB_SHARED_LINK_OSX = -dynamiclib -Wl,-undefined -Wl,dynamic_lookup -compatibility_version $(LIB_VERSION) -current_version $(LIB_VERSION) -Wl,-single_module -mmacosx-version-min=10.7 -install_name ${CURDIR}/$(LIB_SHARED_FULL)
diff --git a/aegisub.changes b/aegisub.changes
index 29f8ade..92f3518 100644
--- a/aegisub.changes
+++ b/aegisub.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Jun 29 14:49:33 UTC 2015 - tjcw@physics.org
+
+- Fix build break by adding -pthread to LDFLAGS
+  * Makefile.inc.in.patch 
+
 -------------------------------------------------------------------
 Tue Feb 10 19:58:33 UTC 2015 - benoit.monin@gmx.fr
 
diff --git a/aegisub.spec b/aegisub.spec
index bcd5437..fba28cf 100644
--- a/aegisub.spec
+++ b/aegisub.spec
@@ -27,6 +27,7 @@ Group:          Productivity/Multimedia/Video/Editors and Convertors
 Url:            http://www.aegisub.net/
 Source0:        http://ftp.aegisub.org/pub/releases/aegisub-%{version}.tar.xz
 Patch0:         aegisub-old_wc.patch
+Patch1:         Makefile.inc.in.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  boost-devel >= 1.50
@@ -65,6 +66,7 @@ functions with ease.
 %prep
 %setup -q
 %patch0 -p1
+%patch1 -p1
 FAKE_BUILDDATE=$(LC_ALL=C date -u -r %{_sourcedir}/%{name}.changes '+%%b %%e %%Y')
 sed -i "s/__DATE__/\"$FAKE_BUILDDATE\"/" src/version.cpp
 FAKE_BUILDTIME=$(LC_ALL=C date -u -r %{_sourcedir}/%{name}.changes '+%%H:%%M:%%S')