diff --git a/src/nostalgia/core/gba/gfx.cpp b/src/nostalgia/core/gba/gfx.cpp
index 23a0a270..c0a6c377 100644
--- a/src/nostalgia/core/gba/gfx.cpp
+++ b/src/nostalgia/core/gba/gfx.cpp
@@ -250,7 +250,7 @@ void hideSprite(Context*, unsigned idx) noexcept {
 		REG_IE = REG_IE | Int_vblank; // enable vblank interrupt handler
 	} else {
 		const auto ie = REG_IE; // disable vblank interrupt handler
-		REG_IE = REG_IE & ~Int_vblank; // disable vblank interrupt handler
+		REG_IE = REG_IE & static_cast<uint16_t>(~Int_vblank); // disable vblank interrupt handler
 		g_spriteBuffer[g_spriteUpdates] = oa;
 		REG_IE = ie; // enable vblank interrupt handler
 	}
@@ -285,7 +285,7 @@ void setSprite(Context*,
 		REG_IE = REG_IE | Int_vblank; // enable vblank interrupt handler
 	} else {
 		const auto ie = REG_IE; // disable vblank interrupt handler
-		REG_IE = REG_IE & ~Int_vblank; // disable vblank interrupt handler
+		REG_IE = REG_IE & static_cast<uint16_t>(~Int_vblank); // disable vblank interrupt handler
 		g_spriteBuffer[g_spriteUpdates] = oa;
 		REG_IE = ie; // enable vblank interrupt handler
 	}