diff --git a/examples/tracking/visual/PyCV_TrackFeaturesFwdBck.jl b/examples/tracking/visual/PyCV_TrackFeaturesFwdBck.jl
index 3ce7de8a4..77b0a68cc 100644
--- a/examples/tracking/visual/PyCV_TrackFeaturesFwdBck.jl
+++ b/examples/tracking/visual/PyCV_TrackFeaturesFwdBck.jl
@@ -134,7 +134,7 @@ function makeBlobFeatureTracksPerImage_FwdBck!(
   
   center_vlb = vlbs_fwdbck[1+floor(Int,length(vlbs_fwdbck)/2)]
 
-  addDataImgTracksFwdBck!(
+  Caesar.addDataImgTracksFwdBck!(
     dfg,
     center_vlb,
     blobstorelbl,
diff --git a/ext/CaesarImageFeaturesExt.jl b/ext/CaesarImageFeaturesExt.jl
index 202edfb42..dd343662e 100644
--- a/ext/CaesarImageFeaturesExt.jl
+++ b/ext/CaesarImageFeaturesExt.jl
@@ -11,7 +11,7 @@ using TensorCast
 import Base: Dict
 import LinearAlgebra: norm
 
-import Caesar: AbstractDFG, BlobEntry, addData!
+import Caesar: AbstractDFG, BlobEntry, addData!, DFG.sha256
 
 import Caesar: toDictFeatures