diff --git a/cups/ppd.c b/cups/ppd.c
index 525df3592..54368ac4c 100644
--- a/cups/ppd.c
+++ b/cups/ppd.c
@@ -3430,12 +3430,12 @@ ppd_update_filters(ppd_file_t *ppd, /* I - PPD file */
srctype[256],
dstsuper[16], /* Destination MIME media type */
dsttype[256],
- program[1024], /* Command to run */
*ptr, /* Pointer into command to run */
buffer[1024], /* Re-written cupsFilter value */
**filter; /* Current filter */
int cost; /* Cost of filter */
+ char program[1024] = { 0 }; /* Command to run */
DEBUG_printf(("4ppd_update_filters(ppd=%p, cg=%p)", ppd, pg));