diff --git a/src/mathlib/CMakeLists.txt b/src/mathlib/CMakeLists.txt
index 092c68ef..027e689a 100644
--- a/src/mathlib/CMakeLists.txt
+++ b/src/mathlib/CMakeLists.txt
@@ -62,5 +62,6 @@ target_precompile_headers( ${PROJECT_NAME} PRIVATE
 )
 target_compile_definitions( ${PROJECT_NAME} PRIVATE
     "BUILDING_MATHLIB"
+    "ALLOW_SIMD_QUATERNION_MATH"
     $<$<OR:$<CONFIG:Debug>,$<CONFIG:Profile>>:DEBUG_MATHLIB>
 )
diff --git a/src/mathlib/ssequaternion.h b/src/mathlib/ssequaternion.h
index 5cb9bc33..5c024cbe 100644
--- a/src/mathlib/ssequaternion.h
+++ b/src/mathlib/ssequaternion.h
@@ -421,8 +421,8 @@ FORCEINLINE fltx4 QuaternionSlerpNoAlignSIMD(const fltx4& p, const fltx4& q, flo
 		SubFloat(result, 1) = SubFloat(q, 0);
 		SubFloat(result, 2) = -SubFloat(q, 3);
 		SubFloat(result, 3) = SubFloat(q, 2);
-		sclp = sin((1.0f - t) * (0.5f * M_PI));
-		sclq = sin(t * (0.5f * M_PI));
+		sclp = (float)sin((1.0f - t) * (0.5f * M_PI));
+		sclq = (float)sin(t * (0.5f * M_PI));
 		SubFloat(result, 0) = sclp * SubFloat(p, 0) + sclq * SubFloat(result, 0);
 		SubFloat(result, 1) = sclp * SubFloat(p, 1) + sclq * SubFloat(result, 1);
 		SubFloat(result, 2) = sclp * SubFloat(p, 2) + sclq * SubFloat(result, 2);