diff --git a/ppd/ppd-ipp.c b/ppd/ppd-ipp.c
index 622ca52a..c21d36c5 100644
--- a/ppd/ppd-ipp.c
+++ b/ppd/ppd-ipp.c
@@ -525,7 +525,8 @@ ppdLoadAttributes(
 	continue;
 
       // Is the PPD file using the "texttotext" filter?
-      if (strcmp(buf + strlen(buf) - 10, "texttotext") == 0)
+      if (strlen(buf) >= 10 &&
+	  strcmp(buf + strlen(buf) - 10, "texttotext") == 0)
 	is_texttotext = 1;
 
       // Separate the first word