diff --git a/src/regexp.h b/src/regexp.h
index 976927e..84e8d19 100644
--- a/src/regexp.h
+++ b/src/regexp.h
@@ -101,7 +101,7 @@
 #endif
     int			nsubexp;	/* number of () */
     int			nstate;
-    nfa_state_T		state[0];	/* actually longer.. */
+    nfa_state_T		state[1];	/* actually longer.. */
 } nfa_regprog_T;
 
 /*
diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c
index 40208d4..df82ebf 100644
--- a/src/regexp_nfa.c
+++ b/src/regexp_nfa.c
@@ -6391,8 +6391,8 @@
      */
     post2nfa(postfix, post_ptr, TRUE);
 
-    /* Space for compiled regexp */
-    prog_size = sizeof(nfa_regprog_T) + sizeof(nfa_state_T) * nstate;
+    /* allocate the regprog with space for the compiled regexp */
+    prog_size = sizeof(nfa_regprog_T) + sizeof(nfa_state_T) * (nstate - 1);
     prog = (nfa_regprog_T *)lalloc(prog_size, TRUE);
     if (prog == NULL)
 	goto fail;
diff --git a/src/version.c b/src/version.c
index 0122a80..8480261 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1165,
+/**/
     1164,
 /**/
     1163,