diff --git a/qgis.spec b/qgis.spec
index abe0334..9b0c4bd 100644
--- a/qgis.spec
+++ b/qgis.spec
@@ -16,6 +16,7 @@
 #
 
 %bcond_without grass
+%bcond_with    otb
 
 Name:           qgis
 Version:        3.8.2
@@ -55,7 +56,9 @@ BuildRequires:  libqscintilla_qt5-devel
 BuildRequires:  libspatialindex-devel
 BuildRequires:  ocl-icd-devel
 BuildRequires:  opencl-cpp-headers
-#BuildRequires:  otb-devel
+%if %{with grass}
+BuildRequires:  otb-devel
+%endif
 BuildRequires:  pkgconfig
 BuildRequires:  poppler-tools
 BuildRequires:  python-qscintilla-qt5-sip