diff --git a/desmume/src/frontend/posix/gtk/main.cpp b/desmume/src/frontend/posix/gtk/main.cpp
index f74f5add6..8bbb159ad 100644
--- a/desmume/src/frontend/posix/gtk/main.cpp
+++ b/desmume/src/frontend/posix/gtk/main.cpp
@@ -353,7 +353,7 @@ struct modify_key_ctx {
 };
 
 static u16 keys_latch = 0;
-u16 Keypad_Temp[NB_KEYS];
+u32 Keypad_Temp[NB_KEYS];
 
 class configured_features : public CommandLine
 {
diff --git a/desmume/src/frontend/posix/gtk2/main.cpp b/desmume/src/frontend/posix/gtk2/main.cpp
index 411ed4f06..2d60bd13d 100644
--- a/desmume/src/frontend/posix/gtk2/main.cpp
+++ b/desmume/src/frontend/posix/gtk2/main.cpp
@@ -670,7 +670,7 @@ struct modify_key_ctx {
 
 static u16 keys_latch = 0;
 static u16 gdk_shift_pressed = 0;
-u16 Keypad_Temp[NB_KEYS];
+u32 Keypad_Temp[NB_KEYS];
 
 class configured_features : public CommandLine
 {