diff --git a/mariadb-connector-c.spec b/mariadb-connector-c.spec
index 2eb5922..5e66144 100644
--- a/mariadb-connector-c.spec
+++ b/mariadb-connector-c.spec
@@ -1,6 +1,6 @@
 Name:           mariadb-connector-c
 Version:        3.0.3
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        The MariaDB Native Client library (C driver)
 License:        LGPLv2+
 Source:         https://downloads.mariadb.org/interstitial/connector-c-%{version}/mariadb-connector-c-%{version}-src.tar.gz
@@ -65,7 +65,7 @@ rm -r win zlib win-iconv examples
        -DINSTALL_BINDIR="%{_bindir}" \
        -DINSTALL_LIBDIR="%{_libdir}" \
        -DINSTALL_INCLUDEDIR=%{_includedir}/mysql \
-       -DPLUGIN_INSTALL_DIR="%{_libdir}/mariadb/plugin"
+       -DINSTALL_PLUGINDIR="%{_libdir}/mariadb/plugin"
 
 
 # Causes build errors:
@@ -149,6 +149,9 @@ end
 #   https://jira.mariadb.org/browse/CONC-291
 
 %changelog
+* Wed Mar 21 2018 Richard W.M. Jones <rjones@redhat.com> - 3.0.3-3
+- Fix plugin install directory (INSTALL_PLUGINDIR not PLUGIN_INSTALL_DIR).
+
 * Thu Feb 08 2018 Fedora Release Engineering <releng@fedoraproject.org> - 3.0.3-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild