diff --git a/CMakeLists.txt b/CMakeLists.txt
index 92dfd40bd12b7c4e82ec8117f20b8b89939a3214..d1a93b36729e0051a00f7d8c1131399c166a25a5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -120,6 +120,8 @@ if (WITH_FIXSTARS)
 	add_subdirectory(lib/libsgm)
 	include_directories(lib/libsgm/include)
 	set_property(TARGET sgm PROPERTY FOLDER "dependencies")
+else()
+	add_library(sgm INTERFACE)
 endif()
 
 if (WITH_CERES)