Index: libpst.c
===================================================================
--- libpst.c	(revision 45)
+++ libpst.c	(working copy)
@@ -296,7 +296,9 @@
       size = _pst_ff_getID2data(pf, ptr, &h);
       // will need to encode any bytes left over
       c = base64_encode(h.base64_extra_chars, h.base64_extra);
-      pst_fwrite(c, 1, strlen(c), fp);
+      if(c != NULL) {
+        pst_fwrite(c, 1, strlen(c), fp);
+      }
     } else {
       DEBUG_WARN (("Couldn't find ID pointer. Cannot save attachement to Base64\n"));
     }