diff --git a/extra/gmic/.SRCINFO b/extra/gmic/.SRCINFO
index 2fa3d7459..9b6179ca0 100644
--- a/extra/gmic/.SRCINFO
+++ b/extra/gmic/.SRCINFO
@@ -1,6 +1,6 @@
 pkgbase = gmic
 	pkgver = 3.3.1
-	pkgrel = 1
+	pkgrel = 2
 	url = https://gmic.eu/
 	arch = x86_64
 	license = custom:CeCILL
diff --git a/extra/gmic/PKGBUILD b/extra/gmic/PKGBUILD
index 162097128..52fb5dbf5 100644
--- a/extra/gmic/PKGBUILD
+++ b/extra/gmic/PKGBUILD
@@ -12,7 +12,7 @@ highmem=1
 pkgbase=gmic
 pkgname=(gmic gimp-plugin-gmic)
 pkgver=3.3.1
-pkgrel=1
+pkgrel=2
 arch=(x86_64)
 url='https://gmic.eu/'
 license=(custom:CeCILL)
@@ -92,6 +92,8 @@ package_gmic() {
 
   DESTDIR="$pkgdir" cmake --install build
   install -Dm644 gmic-$pkgver/COPYING "$pkgdir"/usr/share/licenses/$pkgname/LICENSE
+# .cpp is included by .h
+  install -Dm644 gmic-$pkgver/src/gmic.cpp -t "$pkgdir"/usr/include
 
   DESTDIR="$pkgdir" cmake --install build-qt