diff --git a/gencat/pdf.c b/gencat/pdf.c
index 8aa4378..293f0c7 100644
--- a/gencat/pdf.c
+++ b/gencat/pdf.c
@@ -65,7 +65,9 @@ static struct format {
 	.index_column_skip = 140,
 	.index_lines	= 63,
 	.index_columns	= 4,
-}, format;
+};
+
+static const struct format *format;
 
 static int total, done = 0;
 
@@ -139,23 +141,23 @@ static void make_index(FILE *file, const struct node *node)
 	fprintf(file, "[ /Title (Index) /Count 0 /OUT pdfmark\n");
 
 	fprintf(file, "/%s findfont %d scalefont setfont\n",
-	    format.index.font, format.index.size);
-	fprintf(file, "gsave %s 0 setgray\n", format.overlay_setup);
+	    format->index.font, format->index.size);
+	fprintf(file, "gsave %s 0 setgray\n", format->overlay_setup);
 
 	for (p = idx; p != idx+n; p++) {
-		if (line == format.index_lines) {
+		if (line == format->index_lines) {
 			line = 0;
 			col++;
 		}
-		if (col == format.index_columns) {
+		if (col == format->index_columns) {
 			fprintf(file, "grestore showpage\n");
 			fprintf(file, "gsave %s 0 setgray\n",
-			    format.overlay_setup);
+			    format->overlay_setup);
 			col = 0;
 		}
 		fprintf(file, "newpath %d -%d moveto currentpoint\n",
-		    format.left+col*format.index_column_skip,
-		    format.index.y+line*format.index_line_skip);
+		    format->left+col*format->index_column_skip,
+		    format->index.y+line*format->index_line_skip);
 
 		fprintf(file, "[ /Rect [ ");
 		ps_string(file, p->s);
@@ -207,11 +209,11 @@ static void make_title(FILE *file, const struct node *node, int unit)
 {
 	const struct name *name;
 
-	fprintf(file, "gsave %s 0 setgray\n", format.overlay_setup);
+	fprintf(file, "gsave %s 0 setgray\n", format->overlay_setup);
 
 	fprintf(file, "/%s findfont %d scalefont setfont\n",
-	    format.name.font, format.name.size);
-	fprintf(file, "%d %d moveto\n", format.left, -format.name.y);
+	    format->name.font, format->name.size);
+	fprintf(file, "%d %d moveto\n", format->left, -format->name.y);
 	for (name = node->e->names; name; name = name->next) {
 		if (name != node->e->names)
 			fprintf(file, "(, ) show 0.5 setgray\n");
@@ -226,13 +228,13 @@ static void make_title(FILE *file, const struct node *node, int unit)
 		fprintf(file, " ( \\(%c\\)) show\n", 'A'+unit);
 
 	fprintf(file, "/%s findfont %d scalefont setfont\n",
-	    format.path.font, format.path.size);
-	fprintf(file, "%d %d moveto\n", format.left, -format.path.y);
+	    format->path.font, format->path.size);
+	fprintf(file, "%d %d moveto\n", format->left, -format->path.y);
 	print_path(file, node);
 
 	fprintf(file, "/%s findfont %d scalefont setfont\n",
-	    format.lib.font, format.lib.size);
-	fprintf(file, "%d %d moveto\n", format.left, -format.lib.y);
+	    format->lib.font, format->lib.size);
+	fprintf(file, "%d %d moveto\n", format->left, -format->lib.y);
 	ps_string(file, node->e->file->path);
 	fprintf(file, " show\n");
 
@@ -246,16 +248,16 @@ static void print_comment(FILE *file, const struct line *comment)
 	int lines = 0;
 	int n;
 
-	fprintf(file, "gsave %s 0 setgray\n", format.overlay_setup);
+	fprintf(file, "gsave %s 0 setgray\n", format->overlay_setup);
 	fprintf(file, "/%s findfont %d scalefont setfont\n",
-	    format.comment.font, format.comment.size);
+	    format->comment.font, format->comment.size);
 	for (line = comment; line; line = line->next)
 		lines++;
 	n = 0;
 	for (line = comment; line; line = line->next) {
 		n++;
-		fprintf(file, "%d -%d moveto\n", format.left,
-		    format.comment.y+(n-lines)*format.comment_line_skip);
+		fprintf(file, "%d -%d moveto\n", format->left,
+		    format->comment.y+(n-lines)*format->comment_line_skip);
 		ps_string(file, line->s);
 		fprintf(file, " show\n");
 	}
@@ -279,7 +281,7 @@ static void convert_comp(const struct node *node, FILE *out)
 		make_title(out, node, i);
 		if (!i && node->comment)
 			print_comment(out, node->comment);
-		fprintf(out, "gsave %s\n", format.comp_setup);
+		fprintf(out, "gsave %s\n", format->comp_setup);
 		node->e->file->lib->ps_entry(out, lib, node->e, i);
 		fprintf(out, "\ngrestore\n");
 	}
@@ -324,9 +326,9 @@ void make_pdf(int pdf, int use_portrait)
 	int res;
 
 	if (use_portrait)
-		format = portrait;
+		format = &portrait;
 	else
-		format = landscape;
+		format = &landscape;
 	if (pdf)
 		out = popen(
 		    "gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=- "
@@ -337,7 +339,7 @@ void make_pdf(int pdf, int use_portrait)
 		perror("gs");
 		exit(1);
 	}
-	fprintf(out, "%%!PS\n%s\n", format.file_setup);
+	fprintf(out, "%%!PS\n%s\n", format->file_setup);
 	make_index(out, tree);
 	total = count_tree(tree);
 	convert_tree(tree, out);