diff --git a/extern/oics/ICSPrerequisites.h b/extern/oics/ICSPrerequisites.h
index 864dad15f..3b5d1935b 100644
--- a/extern/oics/ICSPrerequisites.h
+++ b/extern/oics/ICSPrerequisites.h
@@ -39,7 +39,6 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include "tinyxml.h"
 
-#define OIS_DYNAMIC_LIB
 #include <OIS.h>
 #include <OISMouse.h>
 #include <OISKeyboard.h>