diff --git a/srcpkgs/grantlee5/patches/fix-gcc7-qt580-qcwarning.patch b/srcpkgs/grantlee5/patches/fix-gcc7-qt580-qcwarning.patch
new file mode 100644
index 00000000000..68c8246f8e3
--- /dev/null
+++ b/srcpkgs/grantlee5/patches/fix-gcc7-qt580-qcwarning.patch
@@ -0,0 +1,54 @@
+--- templates/lib/customtyperegistry.cpp	2016-04-19 08:33:17.000000000 +0200
++++ templates/lib/customtyperegistry.cpp	2017-12-18 17:59:07.377687292 +0100
+@@ -57,16 +57,16 @@
+ 
+   {
+     if (!types.contains(id)) {
+-      qCWarning(GRANTLEE_CUSTOMTYPE) << "Don't know how to handle metatype"
+-                                     << QMetaType::typeName(id);
++      qCWarning(GRANTLEE_CUSTOMTYPE, "Don't know how to handle metatype %s",
++                                     QMetaType::typeName(id));
+       // :TODO: Print out error message
+       return QVariant();
+     }
+ 
+     const CustomTypeInfo &info = types[id];
+     if (!info.lookupFunction) {
+-      qCWarning(GRANTLEE_CUSTOMTYPE) << "No lookup function for metatype"
+-                                     << QMetaType::typeName(id);
++      qCWarning(GRANTLEE_CUSTOMTYPE, "No lookup function for metatype %s",
++                                     QMetaType::typeName(id));
+       lf = 0;
+       // :TODO: Print out error message
+       return QVariant();
+--- templates/lib/template.cpp	2016-04-19 08:33:17.000000000 +0200
++++ templates/lib/template.cpp	2017-12-18 18:03:59.522681407 +0100
+@@ -66,7 +66,7 @@
+     d->m_nodeList = d->compileString(templateString);
+     d->setError(NoError, QString());
+   } catch (Grantlee::Exception &e) {
+-    qCWarning(GRANTLEE_TEMPLATE) << e.what();
++    qCWarning(GRANTLEE_TEMPLATE, "%s", qPrintable(e.what()));
+     d->setError(e.errorCode(), e.what());
+   }
+ }
+@@ -92,7 +92,7 @@
+     d->m_nodeList.render(stream, c);
+     d->setError(NoError, QString());
+   } catch (Grantlee::Exception &e) {
+-    qCWarning(GRANTLEE_TEMPLATE) << e.what();
++    qCWarning(GRANTLEE_TEMPLATE, "%s", qPrintable(e.what()));
+     d->setError(e.errorCode(), e.what());
+   }
+ 
+--- templates/lib/qtlocalizer.cpp	2016-04-19 08:33:17.000000000 +0200
++++ templates/lib/qtlocalizer.cpp	2017-12-18 18:04:50.501680381 +0100
+@@ -67,7 +67,7 @@
+   {
+     Q_ASSERT(!m_locales.isEmpty());
+     if (m_locales.isEmpty()) {
+-      qCWarning(GRANTLEE_LOCALIZER) << "Invalid Locale";
++      qCWarning(GRANTLEE_LOCALIZER, "Invalid Locale");
+       return QLocale();
+     }
+     return m_locales.last()->locale;
diff --git a/srcpkgs/grantlee5/template b/srcpkgs/grantlee5/template
index 1c2f6c3ade7..288873f2a7b 100644
--- a/srcpkgs/grantlee5/template
+++ b/srcpkgs/grantlee5/template
@@ -1,7 +1,7 @@
 # Template file for 'grantlee5'
 pkgname=grantlee5
 version=5.1.0
-revision=1
+revision=2
 wrksrc=${pkgname%5}-${version}
 build_style=cmake
 makedepends="qt5-script-devel qt5-tools-devel"