diff --git a/adapters/opencv/kleidicv_hal.cpp b/adapters/opencv/kleidicv_hal.cpp
index a4ec0112fe41f9795df7b967bc1d8b4c1c17dd4f..fafa50fc377eae7984d527831ef8ba0be891747a 100644
--- a/adapters/opencv/kleidicv_hal.cpp
+++ b/adapters/opencv/kleidicv_hal.cpp
@@ -647,7 +647,7 @@ int morphology_init(cvhalFilter2D **cvcontext, int operation, int src_type,
 
 #if !KLEIDICV_ENABLE_ALL_OPENCV_HAL
   // KleidiCV is not that fast on smaller kernels
-  if (kernel_width_sz < 5 || kernel_height < 5) {
+  if (kernel_width_sz < 5 || kernel_height_sz < 5) {
     return CV_HAL_ERROR_NOT_IMPLEMENTED;
   }
 #endif
diff --git a/adapters/opencv/kleidicv_hal.h b/adapters/opencv/kleidicv_hal.h
index ec8f232fa8e080f5aaf825f5c46ea4b5c3b7f0cb..ec420ebdc6a29027b1e14b7f9c99d68f3251b58d 100644
--- a/adapters/opencv/kleidicv_hal.h
+++ b/adapters/opencv/kleidicv_hal.h
@@ -236,6 +236,9 @@ static inline int kleidicv_threshold_with_fallback(
 #undef cv_hal_threshold
 #define cv_hal_threshold kleidicv_threshold_with_fallback
 
+// TODO: implement 3x3 kernels and 8UC1 -> 16SC1 data type
+#if KLEIDICV_ENABLE_ALL_OPENCV_HAL
+
 // separable_filter_2d_init
 // no fallback, because it cannot be made sure that
 // separable_filter_2d_operation also uses the fallback
@@ -254,6 +257,8 @@ static inline int kleidicv_threshold_with_fallback(
 #undef cv_hal_sepFilterFree
 #define cv_hal_sepFilterFree kleidicv::hal::separable_filter_2d_free
 
+#endif  // KLEIDICV_ENABLE_ALL_OPENCV_HAL
+
 // gaussian_blur_binomial
 static inline int kleidicv_gaussian_blur_binomial_with_fallback(
     const uchar *src_data, size_t src_step, uchar *dst_data, size_t dst_step,
diff --git a/conformity/opencv/tests.cpp b/conformity/opencv/tests.cpp
index 926de68743d15d39c27fdb1ac19afb2894535492..bce00a81361e98e96fe059d77df18d3b3ca03623 100644
--- a/conformity/opencv/tests.cpp
+++ b/conformity/opencv/tests.cpp
@@ -23,9 +23,12 @@ static std::vector<test> merge_tests(
 }
 
 std::vector<test> all_tests = merge_tests({
+  // clang-format off
     binary_op_tests_get,
     cvtcolor_tests_get,
+#if KLEIDICV_ENABLE_ALL_OPENCV_HAL
     separable_filter_2d_tests_get,
+#endif
     gaussian_blur_tests_get,
     rgb2yuv_tests_get,
     yuv2rgb_tests_get,
@@ -36,6 +39,7 @@ std::vector<test> all_tests = merge_tests({
     scale_tests_get,
     min_max_tests_get,
     in_range_tests_get,
+  // clang-format on
 });
 
 #if MANAGER
diff --git a/doc/opencv.md b/doc/opencv.md
index cd3c5c37c61fb85c122ab03a16b33d89763e23a0..ec4befa0c3387cf7513cff7825b5bd351bcac292 100644
--- a/doc/opencv.md
+++ b/doc/opencv.md
@@ -97,22 +97,6 @@ Notes on parameters:
 * `src.depth()` - only supports `CV_8U` depth.
 * `type` - currently only binary threshold operation is supported ([`cv::THRESH_BINARY`](https://docs.opencv.org/4.10.0/d7/d1b/group__imgproc__misc.html#ggaa9e58d2860d4afa658ef70a9b1115576a147222a96556ebc1d948b372bcd7ac59)).
 
-### [`cv::sepFilter2D()`](https://docs.opencv.org/4.10.0/d4/d86/group__imgproc__filter.html#ga910e29ff7d7b105057d1625a4bf6318d)
-Applies a separable linear filter to an image.\
-Currently only the 5x5 kernel size is supported with `CV_8U`, `CV_16U` or `CV_16S` depths for the source, destination and kernels.\
-In-place filtering is not supported.
-
-Notes on parameters:
-* `src`, `dst`, `kernelX`, `kernelY` - the number of channels must match between source and destination. The types must match between source, destination and kernels. However, the kernels must have 1 channel.
-* `anchor` - values other than `(-1, -1)` or the midpoints of the X and Y kernels respectively are not supported.
-* `delta` - values other than `0.0` are not supported.
-* `borderType` - pixel extrapolation method.
-Supported [OpenCV border types](https://docs.opencv.org/4.10.0/d2/de8/group__core__array.html#ga209f2f4869e304c82d07739337eae7c5) are:
-  + `cv::BORDER_REPLICATE`
-  + `cv::BORDER_REFLECT`
-  + `cv::BORDER_WRAP`
-  + `cv::BORDER_REFLECT_101`
-
 ### [`cv::GaussianBlur()`](https://docs.opencv.org/4.10.0/d4/d86/group__imgproc__filter.html#gaabe8c836e97159a9193fb0b11ac52cf1)
 Blurs an image using a Gaussian filter.\
 The filter's standard deviation must be the same in horizontal and vertical directions (`sigmaX == sigmaY`).\