diff --git a/src/video_capture/decklink.cpp b/src/video_capture/decklink.cpp
index a17a718dc..c0c9cb813 100644
--- a/src/video_capture/decklink.cpp
+++ b/src/video_capture/decklink.cpp
@@ -891,7 +891,7 @@ static void vidcap_decklink_probe(device_info **available_cards, int *card_count
                         realloc(cards, *card_count * sizeof(struct device_info));
                 memset(&cards[*card_count - 1], 0, sizeof(struct device_info));
                 snprintf(cards[*card_count - 1].dev, sizeof cards[*card_count - 1].dev,
-                                ":device=%u", get<unsigned>(d));
+                                ":device=%6x", get<unsigned>(d));
                 snprintf(cards[*card_count - 1].name, sizeof cards[*card_count - 1].name,
                                 "%s", deviceName.c_str());
                 snprintf(cards[*card_count - 1].extra, sizeof cards[*card_count - 1].extra,
diff --git a/src/video_display/decklink.cpp b/src/video_display/decklink.cpp
index 7be8c5a70..9d30478e9 100644
--- a/src/video_display/decklink.cpp
+++ b/src/video_display/decklink.cpp
@@ -1150,7 +1150,7 @@ static void display_decklink_probe(struct device_info **available_cards, int *co
                         realloc(*available_cards, *count * sizeof(struct device_info));
                 memset(*available_cards + *count - 1, 0, sizeof(struct device_info));
                 snprintf((*available_cards)[*count - 1].dev,
-                         sizeof(*available_cards)[*count - 1].dev, ":device=%u",
+                         sizeof(*available_cards)[*count - 1].dev, ":device=%6x",
                          get<unsigned>(d));
                 snprintf((*available_cards)[*count - 1].extra, sizeof (*available_cards)[*count - 1].extra, "\"embeddedAudioAvailable\":\"t\"");
                 (*available_cards)[*count - 1].repeatable = false;