diff --git a/src/gui/debug.cpp b/src/gui/debug.cpp
index 122415a2..b4bf6e76 100644
--- a/src/gui/debug.cpp
+++ b/src/gui/debug.cpp
@@ -369,8 +369,8 @@ void putDispatchChan(void* data, int chanNum, int type) {
       ImGui::Text(" - K2Offs: %d",ch->k2Offs);
       ImGui::Text(" - K1Slide: %d",ch->k1Slide);
       ImGui::Text(" - K2Slide: %d",ch->k2Slide);
-      ImGui::Text(" - K1Prev: %d",ch->k1Prev);
-      ImGui::Text(" - K2Prev: %d",ch->k2Prev);
+      ImGui::Text(" - K1Prev: %.4x",ch->k1Prev);
+      ImGui::Text(" - K2Prev: %.4x",ch->k2Prev);
       ImGui::Text("- vol: %.2x",ch->vol);
       ImGui::Text("- LVol: %.2x",ch->lVol);
       ImGui::Text("- RVol: %.2x",ch->rVol);