diff --git a/source/main.c b/source/main.c
index 70d7eb3..24d6214 100644
--- a/source/main.c
+++ b/source/main.c
@@ -14,6 +14,18 @@ char * language = NULL;
 char * verbatim = NULL;
 char * top = NULL;
 
+void yyerror(const char * const fmt, ...) {
+    extern int yylineno;
+    va_list args;
+    va_start(args, fmt);
+
+    fprintf(stderr, "%s:%d: error: ", input_file_name, yylineno);
+    vfprintf(stderr, fmt, args);
+    fputc('\n', stderr);
+
+    va_end(args);
+}
+
 void put_rule_table(const char * const name, rule_type_t type_mask) {
     char * sprint_buffer;
     int sprint_r;
diff --git a/source/tbsp.y b/source/tbsp.y
index 6e029ea..3d693c4 100644
--- a/source/tbsp.y
+++ b/source/tbsp.y
@@ -1,7 +1,7 @@
 %{
     #include "tbsp.yy.h"
 
-    void yyerror([[maybe_unused]] const char * const s);
+    void yyerror(const char * const s, ...);
 
     extern char * language;
     extern char * top;
@@ -110,10 +110,6 @@ code_section
 
 rule_vector_t rules;
 
-void yyerror(const char * const s) {
-    printf("error: %s", s);
-}
-
 void tbsp_tab_init(void) {
     kv_init(rules);
 }