diff --git a/desmume/src/frontend/posix/gtk/main.cpp b/desmume/src/frontend/posix/gtk/main.cpp
index 8bbb159ad..172d2b2d2 100644
--- a/desmume/src/frontend/posix/gtk/main.cpp
+++ b/desmume/src/frontend/posix/gtk/main.cpp
@@ -1961,7 +1961,7 @@ static void Edit_Joystick_Controls(GSimpleAction *action, GVariant *parameter, g
 
     switch (gtk_dialog_run(GTK_DIALOG(ecDialog))) {
     case GTK_RESPONSE_OK:
-        memcpy(&joypad_cfg, &Keypad_Temp, sizeof(keyboard_cfg));
+        memcpy(&joypad_cfg, &Keypad_Temp, sizeof(joypad_cfg));
         desmume_config_update_joykeys(keyfile);
         break;
     case GTK_RESPONSE_CANCEL:
diff --git a/desmume/src/frontend/posix/gtk2/main.cpp b/desmume/src/frontend/posix/gtk2/main.cpp
index 2d60bd13d..55610d528 100644
--- a/desmume/src/frontend/posix/gtk2/main.cpp
+++ b/desmume/src/frontend/posix/gtk2/main.cpp
@@ -2365,7 +2365,7 @@ static void Edit_Joystick_Controls()
 
     switch (gtk_dialog_run(GTK_DIALOG(ecDialog))) {
     case GTK_RESPONSE_OK:
-        memcpy(&joypad_cfg, &Keypad_Temp, sizeof(keyboard_cfg));
+        memcpy(&joypad_cfg, &Keypad_Temp, sizeof(joypad_cfg));
         desmume_config_update_joykeys(keyfile);
         break;
     case GTK_RESPONSE_CANCEL: