diff --git a/miscmaths.h b/miscmaths.h
index b76cc51871e5b10c981890905a9cab846773a52d..11717b708442d7387637426125285950ef054338 100644
--- a/miscmaths.h
+++ b/miscmaths.h
@@ -31,6 +31,7 @@
 //#pragma interface
 
 using namespace NEWMAT;
+using namespace NiftiIO;
 using namespace std;
 
 namespace MISCMATHS {