diff --git a/matrix.go b/matrix.go
index a6b9730..22669c2 100644
--- a/matrix.go
+++ b/matrix.go
@@ -218,7 +218,10 @@ func (m matrix) gaussianElimination() error {
 		if m[r][r] == 0 {
 			for rowBelow := r + 1; rowBelow < rows; rowBelow++ {
 				if m[rowBelow][r] != 0 {
-					m.SwapRows(r, rowBelow)
+					err := m.SwapRows(r, rowBelow)
+					if err != nil {
+						return err
+					}
 					break
 				}
 			}