diff --git a/app/src/input_events.c b/app/src/input_events.c
index 7d898394..94e7ddba 100644
--- a/app/src/input_events.c
+++ b/app/src/input_events.c
@@ -1,8 +1,8 @@
 #include <input_events.h>
 
-static inline enum sc_mod
-sc_mod_from_sdl(SDL_Keymod mod) {
-    return (enum sc_mod) mod;
+static inline uint16_t
+sc_mod_from_sdl(uint16_t mod) {
+    return mod;
 }
 
 static inline enum sc_keycode
@@ -40,7 +40,7 @@ sc_key_event_from_sdl(struct sc_key_event *event,
     event->keycode = sc_keycode_from_sdl(sdl->keysym.sym);
     event->scancode = sc_scancode_from_sdl(sdl->keysym.scancode);
     event->repeat = sdl->repeat;
-    event->mods = sc_mod_from_sdl(sdl->keysym.mod);
+    event->mod = sc_mod_from_sdl(sdl->keysym.mod);
 }
 
 void
diff --git a/app/src/input_events.h b/app/src/input_events.h
index 1a0ead4e..50dc8abe 100644
--- a/app/src/input_events.h
+++ b/app/src/input_events.h
@@ -282,11 +282,20 @@ enum sc_scancode {
     SC_SCANCODE_RGUI = SDL_SCANCODE_RGUI,
 };
 
+static_assert(sizeof(enum sc_mod) >= sizeof(SDL_Keymod),
+              "SDL_Keymod must be convertible to sc_mod");
+
+static_assert(sizeof(enum sc_keycode) >= sizeof(SDL_Keycode),
+              "SDL_Keycode must be convertible to sc_keycode");
+
+static_assert(sizeof(enum sc_scancode) >= sizeof(SDL_Scancode),
+              "SDL_Scancode must be convertible to sc_scancode");
+
 struct sc_key_event {
     enum sc_action action;
     enum sc_keycode keycode;
     enum sc_scancode scancode;
-    enum sc_mod mods; // bitwise-OR of sc_mod values
+    uint16_t mod; // bitwise-OR of sc_mod values
     uint8_t repeat;
 };