diff --git a/matlab/ols/parse_ols_style_equation.m b/matlab/ols/parse_ols_style_equation.m
index 56292854d..e7652c80e 100644
--- a/matlab/ols/parse_ols_style_equation.m
+++ b/matlab/ols/parse_ols_style_equation.m
@@ -196,7 +196,7 @@ function parsing_error(msg, line, node)
 if nargin == 3 && ~isempty(node)
     error('\nERROR encountered parsing `%s` in equation on line %d: %s\n', printNode(node), line, msg);
 else
-    error('\nERROR encountered parsing of equation on line %d: %s\n', num2str(line), msg)
+    error('\nERROR encountered parsing of equation on line %d: %s\n', line, msg)
 end
 end