diff --git a/Code/Mantid/Framework/Kernel/inc/MantidKernel/DllConfig.h b/Code/Mantid/Framework/Kernel/inc/MantidKernel/DllConfig.h
index 96fed6cccf7af51b84eea96329ec201771bc5784..6cb57dbad3be28067835c4c02493973e796cfcc6 100644
--- a/Code/Mantid/Framework/Kernel/inc/MantidKernel/DllConfig.h
+++ b/Code/Mantid/Framework/Kernel/inc/MantidKernel/DllConfig.h
@@ -28,7 +28,7 @@
 */
 #include "MantidKernel/System.h"
 
-#ifdef IN_MANTID_GEOMETRY
+#ifdef IN_MANTID_KERNEL
 #define MANTID_KERNEL_DLL DLLExport
 #else
 #define MANTID_KERNEL_DLL DLLImport