diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -32,7 +32,10 @@
 
 add_subdirectory(auxiliary)
 add_subdirectory(skyobjects)
-add_subdirectory(fitsviewer)
+
+IF (CFITSIO_FOUND)
+    add_subdirectory(fitsviewer)
+ENDIF ()
 
 IF (UNIX AND NOT APPLE AND CFITSIO_FOUND)
     IF (BUILD_KSTARS_LITE)