Doc typo fix

diff --git a/sv.h b/sv.h
index 55674f6..0146de4 100644 (file)
--- a/sv.h
+++ b/sv.h
@@ -460,7 +460,7 @@ struct xpvnv {
     union _xmgu        xmg_u;                              \
     HV*                xmg_stash       /* class package */
 
-/* These structure must match the beginning of struct xpvhv in hv.h. */
+/* This structure must match the beginning of struct xpvhv in hv.h. */
 struct xpvmg {
     _XPV_HEAD;
     _XPVMG_HEAD;