diff --git a/apps/codecs/demac/libdemac/decoder.c b/apps/codecs/demac/libdemac/decoder.c
index f6c2451c0c..2b8dcd2cf3 100644
--- a/apps/codecs/demac/libdemac/decoder.c
+++ b/apps/codecs/demac/libdemac/decoder.c
@@ -33,13 +33,13 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 
 /* Statically allocate the filter buffers */
 
-static int16_t filterbuf32[(32*3 + HISTORY_SIZE) * 2]     /* 4480 bytes */
+static int16_t filterbuf32[(32*3 + HISTORY_SIZE) * 2]     /* 2432 bytes */
                IBSS_ATTR __attribute__((aligned(16)));
 static int16_t filterbuf256[(256*3 + HISTORY_SIZE) * 2]   /* 5120 bytes */
                IBSS_ATTR __attribute__((aligned(16)));
 
-/* This is only needed for "insane" files, and no Rockbox targets can
-   hope to decode them in realtime anyway. */
+/* This is only needed for "insane" files, and no current Rockbox targets
+   can hope to decode them in realtime, although the Gigabeat S comes close. */
 static int16_t filterbuf1280[(1280*3 + HISTORY_SIZE) * 2] /* 17408 bytes */
                IBSS_ATTR_DEMAC_INSANEBUF __attribute__((aligned(16)));