diff --git a/firmware/common/simd.hpp b/firmware/common/simd.hpp
index 0d65b8dd..c2e9be95 100644
--- a/firmware/common/simd.hpp
+++ b/firmware/common/simd.hpp
@@ -41,6 +41,12 @@ struct vec2_s16 {
 	{
 	}
 
+	constexpr vec2_s16(
+		const int16_t v
+	) : v { v, v }
+	{
+	}
+	
 	constexpr vec2_s16(
 		const int16_t v0,
 		const int16_t v1