1 files changed, 2 insertions, 0 deletions
diff --git a/booki.c b/booki.c
index 3b87585..77cea17 100644
--- a/booki.c
+++ b/booki.c
@@ -515,6 +515,8 @@ void write_book(BOOK book, FILE *output) {
             fwrite(str, 1, size, output);
         } else if (datafield.type == booki_raw) {
             string_field = get_string_field(book, datafield.name);
+            if (!string_field.ptr)
+                continue;
             size = sprintf(str, "%.*s\n", string_field.len, string_field.ptr);
             fwrite(str, 1, size, output);
             ES* next = string_field.next;