diff --git a/gtsam/base/Matrix.cpp b/gtsam/base/Matrix.cpp
index 1de27c0a2..3cafdd0ba 100644
--- a/gtsam/base/Matrix.cpp
+++ b/gtsam/base/Matrix.cpp
@@ -189,7 +189,7 @@ void print(const Matrix& A, const string &s, ostream& stream) {
       0, // flags
       " ", // coeffSeparator
       ";\n", // rowSeparator
-      "  ",  // rowPrefix
+	  " \t",  // rowPrefix
       "", // rowSuffix
       "[\n", // matPrefix
       "\n  ]" // matSuffix
diff --git a/gtsam/linear/JacobianFactor.cpp b/gtsam/linear/JacobianFactor.cpp
index f2678d56c..d4df57298 100644
--- a/gtsam/linear/JacobianFactor.cpp
+++ b/gtsam/linear/JacobianFactor.cpp
@@ -349,11 +349,11 @@ void JacobianFactor::print(const string& s,
     const KeyFormatter& formatter) const {
   static const Eigen::IOFormat matlab(
       Eigen::StreamPrecision, // precision
-      0, // flags
+	  0, // flags
       " ", // coeffSeparator
       ";\n", // rowSeparator
-      "  ",  // rowPrefix
-      "", // rowSuffix
+	  "\t",  // rowPrefix
+	  "", // rowSuffix
       "[\n", // matPrefix
       "\n  ]" // matSuffix
       );