1 files changed, 4 insertions, 0 deletions
diff --git a/ui/text_import.c b/ui/text_import.c
index d7f4b2dcac..f320eb5e42 100644
--- a/ui/text_import.c
+++ b/ui/text_import.c
@@ -566,6 +566,10 @@ append_to_preamble(char *str)
         /* Add a blank separator between the previous token and this token. */
         packet_preamble[packet_preamble_len++] = ' ';
     }
+    if(str == NULL){
+        fprintf(stderr, "FATAL ERROR: str is NULL\n");
+        exit(1);
+    }
     toklen = strlen(str);
     if (toklen != 0) {
         if (packet_preamble_len + toklen > PACKET_PREAMBLE_MAX_LEN)