diff --git a/gap.spec b/gap.spec
index 1b01869..5554107 100644
--- a/gap.spec
+++ b/gap.spec
@@ -31,7 +31,7 @@
 
 Name:           gap
 Version:        4.11.0
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        Computational discrete algebra
 
 %global majver %(cut -d. -f1-2 <<< %{version})
@@ -202,7 +202,9 @@ cp -p %{SOURCE1} README.fedora
 
 %build
 # -Wl,-z,now breaks use of RTLD_LAZY
-export LDFLAGS="-Wl,-z,relro -Wl,--as-needed"
+# Even though the GAP kernel is single-threaded, it must be linked with pthreads
+# or packages cannot successfully load and run multithreaded shared objects.
+export LDFLAGS="-lpthread -Wl,-z,relro -Wl,--as-needed"
 export CPPFLAGS='-DSYS_DEFAULT_PATHS="\"%{gapdir}\""'
 export STRIP=%{_bindir}/true
 %configure
@@ -445,6 +447,9 @@ make check
 %{_libdir}/libgap.so
 
 %changelog
+* Wed Dec 23 2020 Jerry James <loganjerry@gmail.com> - 4.11.0-6
+- Force the binary to be linked with pthreads
+
 * Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 4.11.0-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild