diff --git a/qgis.spec b/qgis.spec
index 865405b..dfcc4ac 100644
--- a/qgis.spec
+++ b/qgis.spec
@@ -11,6 +11,12 @@
 %endif
 %endif
 
+%if 0%{?fedora} >= 27
+%define grass grass74
+%else
+%define grass grass72
+%endif
+
 #TODO: Run test suite (see debian/rules)
 
 Name:           qgis
@@ -215,9 +221,8 @@ gzip ChangeLog
       -D QGIS_MANUAL_SUBDIR=/share/man \
       -D QGIS_CGIBIN_SUBDIR=%{_libexecdir}/%{name} \
       -D WITH_BINDINGS:BOOL=TRUE \
-      -D WITH_GRASS:BOOL=TRUE \
       -D WITH_GRASS7:BOOL=TRUE \
-      -D GRASS_PREFIX=%{_libdir}/grass \
+      -D GRASS_PREFIX7=%{_libdir}/%{grass} \
       -D WITH_CUSTOM_WIDGETS:BOOL=TRUE \
       -D BINDINGS_GLOBAL_INSTALL:BOOL=TRUE \
       -D ENABLE_TESTS:BOOL=FALSE \
@@ -407,6 +412,9 @@ update-mime-database %{?fedora:-n} %{_datadir}/mime &> /dev/null || :
 
 
 %changelog
+* Fri Apr 27 2018 Daniele Viganò <daniele@vigano.me> - 2.18.19-2
+- Rebuild for GRASS 7.4
+
 * Mon Apr 23 2018 Daniele Viganò <daniele@vigano.me> - 2.18.19-1
 - New upstream release