diff --git a/c/tex_parser/tex_table.c b/c/tex_parser/tex_table.c
index 1eb9d4c..911cc5b 100644
--- a/c/tex_parser/tex_table.c
+++ b/c/tex_parser/tex_table.c
@@ -237,7 +237,7 @@ int parse_table(const char *table_source, size_t len, struct table_s *table, str
 			} else if (c == '%') {
 				where_stack[++tex_level] = IN_COMMENT;
 
-			} else if (isprint(c)) {
+			} else if (isgraph(c)) {
 
 			} else {
 				error->code = (int)i;