diff --git a/gfm/sec6.md b/gfm/sec6.md
index 5ad729d..68226ba 100644
--- a/gfm/sec6.md
+++ b/gfm/sec6.md
@@ -159,7 +159,7 @@ char *s;
 s = g_new (char, 10);
 /* s points an array of char. The size of the array is 10. */
 
-struct tuple (int x, int y) *t;
+struct tuple {int x, y;} *t;
 t = g_new (struct tuple, 5);
 /* t points an array of struct tuple. */
 /* The size of the array is 5. */
diff --git a/src/sec6.src.md b/src/sec6.src.md
index 97329d9..a3609de 100644
--- a/src/sec6.src.md
+++ b/src/sec6.src.md
@@ -157,7 +157,7 @@ char *s;
 s = g_new (char, 10);
 /* s points an array of char. The size of the array is 10. */
 
-struct tuple (int x, int y) *t;
+struct tuple {int x, y;} *t;
 t = g_new (struct tuple, 5);
 /* t points an array of struct tuple. */
 /* The size of the array is 5. */