diff --git a/gammaray.spec b/gammaray.spec
index 89c884a..1836b93 100644
--- a/gammaray.spec
+++ b/gammaray.spec
@@ -44,7 +44,10 @@ BuildRequires:  libQt5Gui-private-headers-devel >= 5.3.0
 BuildRequires:  libQt5Network-private-headers-devel >= 5.3.0
 BuildRequires:  libdw-devel
 BuildRequires:  libqt5-qt3d-devel >= 5.3.0
+BuildRequires:  libqt5-qtbase-doc >= 5.3.0
 BuildRequires:  libqt5-qtdeclarative-private-headers-devel >= 5.3.0
+# Needed to build the user manual
+BuildRequires:  libqt5-qtdoc-devel
 BuildRequires:  libqt5-qttools >= 5.3.0
 BuildRequires:  update-desktop-files
 BuildRequires:  vtk-devel