diff --git a/camlibs/ptp/library.c b/camlibs/ptp/library.c
index ca3c93f80..4f21c7a98 100644
--- a/camlibs/ptp/library.c
+++ b/camlibs/ptp/library.c
@@ -212,6 +212,12 @@ static struct {
 	/* Nikon D100 has a PTP mode: westin 2002.10.16 */
 	{"Nikon DSC D100", 0x04b0, 0x0402},
 
+	/* (at least some) newer Canon cameras can be switched between
+	 * PTP and "normal" (i.e. Canon) mode 
+	 */
+	{"Canon PowerShot S45 (PTP mode)", 0x04A9, 0x306D}, /* 0x306C is S45 in normal (canon) mode */
+	{"Canon PowerShot S230 (PTP mode)", 0x04A9, 0x3071}, /* 0x3070 is S230 in normal (canon) mode */
+
 	/* more comming soon :) */
 	{NULL, 0, 0}
 };