diff --git a/gtsam/base/Vector.h b/gtsam/base/Vector.h
index 3d854916c..16b0643ae 100644
--- a/gtsam/base/Vector.h
+++ b/gtsam/base/Vector.h
@@ -251,10 +251,10 @@ inline double sum(const Vector &a){return a.sum();}
 
 inline Vector zero(size_t n) { return Vector::Zero(n);}
 inline Vector ones(size_t n) { return Vector::Ones(n); }
+inline size_t dim(const Vector& v) { return v.size(); }
 #endif
 inline Vector delta(size_t n, size_t i, double value){ return Vector::Unit(n, i) * value;}
 inline Vector basis(size_t n, size_t i) { return delta(n, i, 1.0); }
-inline size_t dim(const Vector& v) { return v.size(); }
 
 } // namespace gtsam
 
diff --git a/gtsam/geometry/tests/testOrientedPlane3.cpp b/gtsam/geometry/tests/testOrientedPlane3.cpp
index 7266aaf32..b3d87f18c 100644
--- a/gtsam/geometry/tests/testOrientedPlane3.cpp
+++ b/gtsam/geometry/tests/testOrientedPlane3.cpp
@@ -96,7 +96,7 @@ inline static Vector randomVector(const Vector& minLimits,
     const Vector& maxLimits) {
 
   // Get the number of dimensions and create the return vector
-  size_t numDims = dim(minLimits);
+  size_t numDims = minLimits.size();
   Vector vector = Vector::Zero(numDims);
 
   // Create the random vector