diff --git a/includes/rtm/mask4d.h b/includes/rtm/mask4d.h
index 1cb09c4..08ebc23 100644
--- a/includes/rtm/mask4d.h
+++ b/includes/rtm/mask4d.h
@@ -400,6 +400,34 @@ namespace rtm
 #endif
 	}
 
+	//////////////////////////////////////////////////////////////////////////
+	// Per component logical NOT of the input: ~input
+	//////////////////////////////////////////////////////////////////////////
+	RTM_DISABLE_SECURITY_COOKIE_CHECK RTM_FORCE_INLINE mask4d RTM_SIMD_CALL mask_not(mask4d_arg0 input) RTM_NO_EXCEPT
+	{
+#if defined(RTM_SSE2_INTRINSICS)
+		const __m128i true_mask = _mm_set_epi64x(0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL);
+		__m128d xy = _mm_andnot_pd(input.xy, _mm_castsi128_pd(true_mask));
+		__m128d zw = _mm_andnot_pd(input.zw, _mm_castsi128_pd(true_mask));
+		return mask4d{ xy, zw };
+#else
+		const uint64_t* input_ = rtm_impl::bit_cast<const uint64_t*>(&input);
+
+		union
+		{
+			mask4d vector;
+			uint64_t scalar[4];
+		} result;
+
+		result.scalar[0] = ~input_[0];
+		result.scalar[1] = ~input_[1];
+		result.scalar[2] = ~input_[2];
+		result.scalar[3] = ~input_[3];
+
+		return result.vector;
+#endif
+	}
+
 	RTM_IMPL_VERSION_NAMESPACE_END
 }
 
diff --git a/includes/rtm/mask4f.h b/includes/rtm/mask4f.h
index 89d9dc0..7280048 100644
--- a/includes/rtm/mask4f.h
+++ b/includes/rtm/mask4f.h
@@ -359,6 +359,34 @@ namespace rtm
 #endif
 	}
 
+	//////////////////////////////////////////////////////////////////////////
+	// Per component logical NOT of the input: ~input
+	//////////////////////////////////////////////////////////////////////////
+	RTM_DISABLE_SECURITY_COOKIE_CHECK RTM_FORCE_INLINE mask4f RTM_SIMD_CALL mask_not(mask4f_arg0 input) RTM_NO_EXCEPT
+	{
+#if defined(RTM_SSE2_INTRINSICS)
+		const __m128i true_mask = _mm_set_epi32(0xFFFFFFFFULL, 0xFFFFFFFFULL, 0xFFFFFFFFULL, 0xFFFFFFFFULL);
+		return _mm_andnot_ps(input, _mm_castsi128_ps(true_mask));
+#elif defined(RTM_NEON_INTRINSICS)
+		return vmvnq_u32(input);
+#else
+		const uint32_t* input_ = rtm_impl::bit_cast<const uint32_t*>(&input);
+
+		union
+		{
+			mask4f vector;
+			uint32_t scalar[4];
+		} result;
+
+		result.scalar[0] = ~input_[0];
+		result.scalar[1] = ~input_[1];
+		result.scalar[2] = ~input_[2];
+		result.scalar[3] = ~input_[3];
+
+		return result.vector;
+#endif
+	}
+
 	RTM_IMPL_VERSION_NAMESPACE_END
 }
 
diff --git a/includes/rtm/mask4i.h b/includes/rtm/mask4i.h
index a8d5e3f..e633604 100644
--- a/includes/rtm/mask4i.h
+++ b/includes/rtm/mask4i.h
@@ -327,6 +327,21 @@ namespace rtm
 #endif
 	}
 
+	//////////////////////////////////////////////////////////////////////////
+	// Per component logical NOT of the input: ~input
+	//////////////////////////////////////////////////////////////////////////
+	RTM_DISABLE_SECURITY_COOKIE_CHECK RTM_FORCE_INLINE mask4i RTM_SIMD_CALL mask_not(mask4i_arg0 input) RTM_NO_EXCEPT
+	{
+#if defined(RTM_SSE2_INTRINSICS)
+		const __m128i true_mask = _mm_set_epi32(0xFFFFFFFFULL, 0xFFFFFFFFULL, 0xFFFFFFFFULL, 0xFFFFFFFFULL);
+		return _mm_andnot_si128(input, true_mask);
+#elif defined(RTM_NEON_INTRINSICS)
+		return RTM_IMPL_MASK4i_SET(vmvnq_u32(RTM_IMPL_MASK4i_GET(input)));
+#else
+		return mask4i{ ~input.x, ~input.y, ~input.z, ~input.w };
+#endif
+	}
+
 	RTM_IMPL_VERSION_NAMESPACE_END
 }
 
diff --git a/includes/rtm/mask4q.h b/includes/rtm/mask4q.h
index 3127f6d..fcbf102 100644
--- a/includes/rtm/mask4q.h
+++ b/includes/rtm/mask4q.h
@@ -364,6 +364,34 @@ namespace rtm
 #endif
 	}
 
+	//////////////////////////////////////////////////////////////////////////
+	// Per component logical NOT of the input: ~input
+	//////////////////////////////////////////////////////////////////////////
+	RTM_DISABLE_SECURITY_COOKIE_CHECK RTM_FORCE_INLINE mask4q RTM_SIMD_CALL mask_not(mask4q_arg0 input) RTM_NO_EXCEPT
+	{
+#if defined(RTM_SSE2_INTRINSICS)
+		const __m128i true_mask = _mm_set_epi64x(0xFFFFFFFFFFFFFFFFULL, 0xFFFFFFFFFFFFFFFFULL);
+		__m128i xy = _mm_andnot_si128(input.xy, true_mask);
+		__m128i zw = _mm_andnot_si128(input.zw, true_mask);
+		return mask4q{ xy, zw };
+#else
+		const uint64_t* input_ = rtm_impl::bit_cast<const uint64_t*>(&input);
+
+		union
+		{
+			mask4q vector;
+			uint64_t scalar[4];
+		} result;
+
+		result.scalar[0] = ~input_[0];
+		result.scalar[1] = ~input_[1];
+		result.scalar[2] = ~input_[2];
+		result.scalar[3] = ~input_[3];
+
+		return result.vector;
+#endif
+	}
+
 	RTM_IMPL_VERSION_NAMESPACE_END
 }
 
diff --git a/tests/sources/test_mask4.cpp b/tests/sources/test_mask4.cpp
index 81d9caf..3dc4e91 100644
--- a/tests/sources/test_mask4.cpp
+++ b/tests/sources/test_mask4.cpp
@@ -100,6 +100,26 @@ inline Mask4Type reference_mask_xor(const Mask4Type& input0, const Mask4Type& in
 	return result;
 }
 
+template<typename IntType, typename Mask4Type>
+inline Mask4Type reference_mask_not(const Mask4Type& input)
+{
+	IntType input_[4];
+
+	static_assert(sizeof(Mask4Type) == sizeof(input_), "Unexpected size");
+	std::memcpy(&input_[0], &input, sizeof(Mask4Type));
+
+	IntType result_[4];
+	result_[0] = ~input_[0];
+	result_[1] = ~input_[1];
+	result_[2] = ~input_[2];
+	result_[3] = ~input_[3];
+
+	Mask4Type result;
+	std::memcpy(&result, &result_[0], sizeof(Mask4Type));
+
+	return result;
+}
+
 template<typename MaskType, typename IntType>
 static void test_mask_impl()
 {
@@ -298,6 +318,10 @@ static void test_mask_impl()
 		CHECK(mask_all_equal(mask_xor(mask0, mask1), reference_mask_xor<IntType>(mask0, mask1)));
 		CHECK(mask_all_equal(mask_xor(mask0, mask2), reference_mask_xor<IntType>(mask0, mask2)));
 		CHECK(mask_all_equal(mask_xor(mask1, mask2), reference_mask_xor<IntType>(mask1, mask2)));
+
+		CHECK(mask_all_equal(mask_not(mask0), reference_mask_not<IntType>(mask0)));
+		CHECK(mask_all_equal(mask_not(mask1), reference_mask_not<IntType>(mask1)));
+		CHECK(mask_all_equal(mask_not(mask2), reference_mask_not<IntType>(mask2)));
 	}
 }