diff --git a/assets/parser.d.erb b/assets/parser.d.erb
index 42ccf65..298c4f1 100644
--- a/assets/parser.d.erb
+++ b/assets/parser.d.erb
@@ -59,10 +59,10 @@ public alias <%= @grammar.prefix %>code_point_t = uint;
  */
 public struct <%= @grammar.prefix %>position_t
 {
-    /** Input text row (0-based). */
+    /** Input text row (1-based). */
     uint row;
 
-    /** Input text column (0-based). */
+    /** Input text column (1-based). */
     uint col;
 
     /** Invalid position value. */
diff --git a/assets/parser.h.erb b/assets/parser.h.erb
index 7e3100b..b54ca81 100644
--- a/assets/parser.h.erb
+++ b/assets/parser.h.erb
@@ -45,10 +45,10 @@ typedef uint32_t <%= @grammar.prefix %>code_point_t;
  */
 typedef struct
 {
-    /** Input text row (0-based). */
+    /** Input text row (1-based). */
     uint32_t row;
 
-    /** Input text column (0-based). */
+    /** Input text column (1-based). */
     uint32_t col;
 } <%= @grammar.prefix %>position_t;
 
diff --git a/doc/user_guide.md b/doc/user_guide.md
index 6498563..f2d8b61 100644
--- a/doc/user_guide.md
+++ b/doc/user_guide.md
@@ -1346,7 +1346,7 @@ if (p_parse(context) == P_UNEXPECTED_TOKEN)
 {
     p_position_t error_position = p_position(context);
     fprintf(stderr, "Error: unexpected token at row %u column %u\n",
-        error_position.row + 1, error_position.col + 1);
+        error_position.row, error_position.col);
 }
 ```
 
@@ -1474,7 +1474,7 @@ if (p_parse(context) == P_UNEXPECTED_TOKEN)
     p_position_t error_position = p_position(context);
     fprintf(stderr, "Error: unexpected token `%s' at row %u column %u\n",
         p_token_names[context->token],
-        error_position.row + 1, error_position.col + 1);
+        error_position.row, error_position.col);
 }
 ```