diff --git a/lib/luks2/luks2_luks1_convert.c b/lib/luks2/luks2_luks1_convert.c
index 08a3ddc1..561ef382 100644
--- a/lib/luks2/luks2_luks1_convert.c
+++ b/lib/luks2/luks2_luks1_convert.c
@@ -436,7 +436,6 @@ static int move_keyslot_areas(struct crypt_device *cd, off_t offset_from,
 
 	devfd = device_open(device, O_RDWR);
 	if (devfd == -1) {
-		log_dbg("Cannot open device %s.", device_path(device));
 		free(buf);
 		return -EIO;
 	}
@@ -488,7 +487,6 @@ static int luksmeta_header_present(struct crypt_device *cd, off_t luks1_size)
 
 	devfd = device_open(device, O_RDONLY);
 	if (devfd == -1) {
-		log_dbg("Cannot open device %s.", device_path(device));
 		free(buf);
 		return -EIO;
 	}
diff --git a/lib/utils_device.c b/lib/utils_device.c
index 7649c695..11d23544 100644
--- a/lib/utils_device.c
+++ b/lib/utils_device.c
@@ -246,7 +246,9 @@ static int device_open_internal(struct device *device, int flags)
 		devfd = open(device_path(device), flags);
 
 	if (devfd < 0)
-		log_dbg("Cannot open device %s.", device_path(device));
+		log_dbg("Cannot open device %s%s.",
+			device_path(device),
+			(flags & O_ACCMODE) != O_RDONLY ? " for write" : "");
 
 	return devfd;
 }