diff --git a/src/tools/pg_bsd_indent/indent_globs.h b/src/tools/pg_bsd_indent/indent_globs.h
index 917961bd3d6..e88dd52c891 100644
--- a/src/tools/pg_bsd_indent/indent_globs.h
+++ b/src/tools/pg_bsd_indent/indent_globs.h
@@ -234,8 +234,8 @@ extern int   ifdef_level;
 struct parser_state {
     int         last_token;
     int         p_stack[256];	/* this is the parsers stack */
-    int         il[64];		/* this stack stores indentation levels */
-    float       cstk[32];	/* used to store case stmt indentation levels */
+    int         il[256];		/* this stack stores indentation levels */
+    float       cstk[256];	/* used to store case stmt indentation levels */
     int         box_com;	/* set to true when we are in a "boxed"
 				 * comment. In that case, the first non-blank
 				 * char should be lined up with the / in / followed by * */
diff --git a/src/tools/pg_bsd_indent/parse.c b/src/tools/pg_bsd_indent/parse.c
index 94cea724393..f50a03193e1 100644
--- a/src/tools/pg_bsd_indent/parse.c
+++ b/src/tools/pg_bsd_indent/parse.c
@@ -203,7 +203,7 @@ parse(int tk) /* tk: the code for the construct scanned */
 
     }				/* end of switch */
 
-    if (ps.tos >= nitems(ps.p_stack) - 1)
+    if (ps.tos >= nitems(ps.p_stack) - 2)
 	errx(1, "Parser stack overflow");
 
     reduce();			/* see if any reduction can be done */
-- 
2.43.0