diff --git a/src/lib/matrix/matrix/Matrix.hpp b/src/lib/matrix/matrix/Matrix.hpp
index e3eecf2dd871..33d2e6cbf0bc 100644
--- a/src/lib/matrix/matrix/Matrix.hpp
+++ b/src/lib/matrix/matrix/Matrix.hpp
@@ -391,12 +391,6 @@ class Matrix
 			for (unsigned j = 0; j < N; j++) {
 				double d = static_cast<double>(self(i, j));
 
-				// Matrix diagonal elements
-				if (N > 1 && M > 1 && i == j) {
-					// make diagonal elements bold (ANSI CSI n 1)
-					printf("\033[1m");
-				}
-
 				// if symmetric don't print upper triangular elements
 				if ((M == N) && (j > i) && (i < N) && (j < M)
 				    && (fabs(d - static_cast<double>(self(j, i))) < (double)eps)
@@ -417,12 +411,6 @@ class Matrix
 						printf("% 6.5f ", d);
 					}
 				}
-
-				// Matrix diagonal elements
-				if (N > 1 && M > 1 && i == j) {
-					// reset any formatting (ANSI CSI n 0)
-					printf("\033[0m");
-				}
 			}
 
 			printf("\n");