diff --git a/gtsam/inference/DotWriter.cpp b/gtsam/inference/DotWriter.cpp
index d6b80b4fd..fb3ea0505 100644
--- a/gtsam/inference/DotWriter.cpp
+++ b/gtsam/inference/DotWriter.cpp
@@ -61,7 +61,7 @@ void DotWriter::ConnectVariableFactor(Key key, size_t i, ostream* os) {
       << "factor" << i << ";\n";
 }
 
-void DotWriter::ProcessFactor(size_t i, const KeyVector& keys,
+void DotWriter::processFactor(size_t i, const KeyVector& keys,
                               const boost::optional<Vector2>& position,
                               ostream* os) const {
   if (plotFactorPoints) {
@@ -90,4 +90,4 @@ void DotWriter::ProcessFactor(size_t i, const KeyVector& keys,
   }
 }
 
-}  // namespace gtsam
\ No newline at end of file
+}  // namespace gtsam
diff --git a/gtsam/inference/DotWriter.h b/gtsam/inference/DotWriter.h
index 011eca058..8f36f3ce6 100644
--- a/gtsam/inference/DotWriter.h
+++ b/gtsam/inference/DotWriter.h
@@ -61,7 +61,7 @@ struct GTSAM_EXPORT DotWriter {
   static void ConnectVariableFactor(Key key, size_t i, std::ostream* os);
 
   /// Draw a single factor, specified by its index i and its variable keys.
-  void ProcessFactor(size_t i, const KeyVector& keys,
+  void processFactor(size_t i, const KeyVector& keys,
                      const boost::optional<Vector2>& position,
                      std::ostream* os) const;
 };
diff --git a/gtsam/inference/FactorGraph-inst.h b/gtsam/inference/FactorGraph-inst.h
index 493f868e1..06b71036c 100644
--- a/gtsam/inference/FactorGraph-inst.h
+++ b/gtsam/inference/FactorGraph-inst.h
@@ -143,7 +143,7 @@ void FactorGraph<FACTOR>::dot(std::ostream& os, const DotWriter& writer,
     const auto& factor = at(i);
     if (factor) {
       const KeyVector& factorKeys = factor->keys();
-      writer.ProcessFactor(i, factorKeys, boost::none, &os);
+      writer.processFactor(i, factorKeys, boost::none, &os);
     }
   }
 
diff --git a/gtsam/nonlinear/NonlinearFactorGraph.cpp b/gtsam/nonlinear/NonlinearFactorGraph.cpp
index a6f715d9e..7c6d2e6cf 100644
--- a/gtsam/nonlinear/NonlinearFactorGraph.cpp
+++ b/gtsam/nonlinear/NonlinearFactorGraph.cpp
@@ -121,7 +121,7 @@ void NonlinearFactorGraph::dot(std::ostream& os, const Values& values,
     // Create factors and variable connections
     size_t i = 0;
     for (const KeyVector& factorKeys : structure) {
-      writer.ProcessFactor(i++, factorKeys, boost::none, &os);
+      writer.processFactor(i++, factorKeys, boost::none, &os);
     }
   } else {
     // Create factors and variable connections
@@ -129,7 +129,7 @@ void NonlinearFactorGraph::dot(std::ostream& os, const Values& values,
       const NonlinearFactor::shared_ptr& factor = at(i);
       if (factor) {
         const KeyVector& factorKeys = factor->keys();
-        writer.ProcessFactor(i, factorKeys, writer.factorPos(min, i), &os);
+        writer.processFactor(i, factorKeys, writer.factorPos(min, i), &os);
       }
     }
   }