diff --git a/znc.spec b/znc.spec
index 14074d9..c8e331a 100644
--- a/znc.spec
+++ b/znc.spec
@@ -138,7 +138,7 @@ rm -rf "$gpghome" $key.gpg # Cleanup tmp gpg home dir and dearmored key
 %else # 0%{?with_modpython}
      --disable-python \
 %endif # 0%{?with_modpython}
-     --enable-ipv6 --enable-cyrus --enable-tcl
+     --enable-ipv6 --enable-cyrus --enable-tcl --with-tcl=%{_libdir}
 %make_build V=1
 
 
@@ -222,6 +222,7 @@ getent passwd znc >/dev/null || \
 - Check upstream GPG signature in %%prep
 - Simplify %%{_libdir}/znc/ file list
 - Enable verbose make
+- Pass --with-tcl to ensure tclConfig.sh is found
 
 * Mon Jul 23 2018 Nick Bebout <nb@fedoraproject.org> - 1.7.1-2
 - Add gcc-c++ and redhat-rpm-config to znc-devel's dependencies