diff --git a/00290-cryptmodule-Include-crypt.h-for-declaration-of-crypt.patch b/00290-cryptmodule-Include-crypt.h-for-declaration-of-crypt.patch
index be62939..38aa7de 100644
--- a/00290-cryptmodule-Include-crypt.h-for-declaration-of-crypt.patch
+++ b/00290-cryptmodule-Include-crypt.h-for-declaration-of-crypt.patch
@@ -1,4 +1,4 @@
-From 6811089dbf34a2cef9799e1cb6d63b863b58739f Mon Sep 17 00:00:00 2001
+From bb9a8332e54fd6d2b0d4767b55c7df9a36ad3022 Mon Sep 17 00:00:00 2001
 From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
 Date: Sun, 21 Jan 2018 18:55:31 +0100
 Subject: [PATCH] cryptmodule: Include <crypt.h> for declaration of crypt() if
@@ -9,18 +9,18 @@ and may use an external or replacement library, like libxcrypt, for
 providing such functions.
 ---
  Modules/_cryptmodule.c | 4 ++++
- configure.ac           | 4 ++++
- 2 files changed, 8 insertions(+)
+ configure.ac           | 2 +-
+ 2 files changed, 5 insertions(+), 1 deletion(-)
 
 diff --git a/Modules/_cryptmodule.c b/Modules/_cryptmodule.c
-index 58d179e6a3..bb26d83f55 100644
+index 58d179e6a3..0031037b64 100644
 --- a/Modules/_cryptmodule.c
 +++ b/Modules/_cryptmodule.c
 @@ -5,6 +5,10 @@
  
  #include <sys/types.h>
  
-+#if defined(HAVE_XCRYPT)
++#if defined(HAVE_CRYPT_H)
 +#include <crypt.h>
 +#endif
 +
@@ -28,20 +28,18 @@ index 58d179e6a3..bb26d83f55 100644
  
  /*[clinic input]
 diff --git a/configure.ac b/configure.ac
-index 39e2e8e769..129c198c15 100644
+index 39e2e8e769..79397a7a24 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -2816,6 +2816,10 @@ LIBS="$withval $LIBS"
- 
- PKG_PROG_PKG_CONFIG
- 
-+# Check for libxcrypt is present.
-+PKG_CHECK_MODULES([libxcrypt], libxcrypt,
-+            AC_DEFINE([HAVE_XCRYPT], 1, [Define to 1 if libxcrypt is found.]), [])
-+
- # Check for use of the system expat library
- AC_MSG_CHECKING(for --with-system-expat)
- AC_ARG_WITH(system_expat,
+@@ -2049,7 +2049,7 @@ AC_CHECK_HEADERS(asm/types.h conio.h direct.h dlfcn.h errno.h \
+ fcntl.h grp.h \
+ ieeefp.h io.h langinfo.h libintl.h process.h pthread.h \
+ sched.h shadow.h signal.h stropts.h termios.h \
+-unistd.h utime.h \
++unistd.h crypt.h utime.h \
+ poll.h sys/devpoll.h sys/epoll.h sys/poll.h \
+ sys/audioio.h sys/xattr.h sys/bsdtty.h sys/event.h sys/file.h sys/ioctl.h \
+ sys/kern_control.h sys/loadavg.h sys/lock.h sys/mkdev.h sys/modem.h \
 -- 
-2.16.0
+2.16.1
 
diff --git a/00291-setup-Link-ctypes-against-dl-explicitly.patch b/00291-setup-Link-ctypes-against-dl-explicitly.patch
new file mode 100644
index 0000000..4bf4801
--- /dev/null
+++ b/00291-setup-Link-ctypes-against-dl-explicitly.patch
@@ -0,0 +1,25 @@
+From aae2ef0bace0e38f4ee5aaa4642aa32450a84216 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
+Date: Tue, 23 Jan 2018 14:43:43 +0100
+Subject: [PATCH] setup: Link ctypes against dl explicitly
+
+---
+ setup.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/setup.py b/setup.py
+index c23628a2a9..9e40bb53e6 100644
+--- a/setup.py
++++ b/setup.py
+@@ -1935,7 +1935,7 @@ class PyBuildExt(build_ext):
+         self.use_system_libffi = False
+         include_dirs = []
+         extra_compile_args = []
+-        extra_link_args = []
++        extra_link_args = ['-ldl']
+         sources = ['_ctypes/_ctypes.c',
+                    '_ctypes/callbacks.c',
+                    '_ctypes/callproc.c',
+-- 
+2.16.1
+
diff --git a/python37.spec b/python37.spec
index a31689d..5e898b4 100644
--- a/python37.spec
+++ b/python37.spec
@@ -167,11 +167,6 @@ License: Python
 # on files that test invalid syntax.
 %undefine py_auto_byte_compile
 
-# Disable strict symbol checks in the link editor.
-# See: https://src.fedoraproject.org/rpms/redhat-rpm-config/c/078af192613e1beec34824a94dc5f6feeeea1568?branch=master
-# https://bugzilla.redhat.com/show_bug.cgi?id=1537489
-%undefine _strict_symbol_defs_build
-
 # For multilib support, files that are different between 32- and 64-bit arches
 # need different filenames. Use "64" or "32" according to the word size.
 # Currently, the best way to determine an architecture's word size happens to
@@ -386,6 +381,12 @@ Patch289: 00289-fix-nis-compilation.patch
 # Reported upstream: https://bugs.python.org/issue32635
 Patch290: 00290-cryptmodule-Include-crypt.h-for-declaration-of-crypt.patch
 
+# 00291 #
+# Build fails with undefined references to dlopen / dlsym otherwise.
+# See: https://bugzilla.redhat.com/show_bug.cgi?id=1537489
+# and: https://src.fedoraproject.org/rpms/redhat-rpm-config/c/078af19
+Patch291: 00291-setup-Link-ctypes-against-dl-explicitly.patch
+
 # (New patches go here ^^^)
 #
 # When adding new patches to "python" and "python3" in Fedora, EL, etc.,
@@ -689,6 +690,7 @@ sed -r -i s/'_PIP_VERSION = "[0-9.]+"'/'_PIP_VERSION = "%{pip_version}"'/ Lib/en
 %patch274 -p1
 %patch289 -p1
 %patch290 -p1
+%patch291 -p1
 
 
 # Remove files that should be generated by the build