diff --git a/fdt.tcl b/fdt.tcl
index 9a5509b40b0ae61ce7a8149eca9f0d684a8da158..cd4c0d84cdf5654340901e4aa97dfd1406c4e66f 100644
--- a/fdt.tcl
+++ b/fdt.tcl
@@ -301,9 +301,9 @@ proc mm_to_voxels { X Y Z mask } {
     upvar $Z cZ
 
 
-    set vcX [ exec sh -c "echo $cX $cY $cZ | $FSLDIR/bin/tal2imgcoord -img $mask -vox - | awk '{print \$1}'" ]    
-    set vcY [ exec sh -c "echo $cX $cY $cZ | $FSLDIR/bin/tal2imgcoord -img $mask -vox - | awk '{print \$2}'" ] 
-    set vcZ [ exec sh -c "echo $cX $cY $cZ | $FSLDIR/bin/tal2imgcoord -img $mask -vox - | awk '{print \$3}'" ] 	
+    set vcX [ exec sh -c "echo $cX $cY $cZ | $FSLDIR/bin/std2imgcoord -img $mask -vox - | awk '{print \$1}'" ]    
+    set vcY [ exec sh -c "echo $cX $cY $cZ | $FSLDIR/bin/std2imgcoord -img $mask -vox - | awk '{print \$2}'" ] 
+    set vcZ [ exec sh -c "echo $cX $cY $cZ | $FSLDIR/bin/std2imgcoord -img $mask -vox - | awk '{print \$3}'" ] 	
     set cX $vcX
     set cY $vcY
     set cZ $vcZ