diff --git a/lib/Utilities/ShellImplFactory.cpp b/lib/Utilities/ShellImplFactory.cpp
index c9c5525c77..be0f2bb608 100644
--- a/lib/Utilities/ShellImplFactory.cpp
+++ b/lib/Utilities/ShellImplFactory.cpp
@@ -30,9 +30,9 @@
 
 #ifdef _WIN32
 #include "LinenoiseShell.h"
-#elif TRI_HAVE_LINENOISE
+#elif defined TRI_HAVE_LINENOISE
 #include "LinenoiseShell.h"
-#elif TRI_HAVE_READLINE
+#elif defined TRI_HAVE_READLINE
 #include "ReadlineShell.h"
 #else 
 #include "DummyShell.h"