diff --git a/example/ck_tile/18_flatmm/CMakeLists.txt b/example/ck_tile/18_flatmm/CMakeLists.txt
index 0f69fc7739..4aa7456bc0 100644
--- a/example/ck_tile/18_flatmm/CMakeLists.txt
+++ b/example/ck_tile/18_flatmm/CMakeLists.txt
@@ -3,6 +3,9 @@ add_executable(tile_example_flatmm_basic EXCLUDE_FROM_ALL flatmm_basic.cpp)
 set(EXAMPLE_FLATMM_COMPILE_OPTIONS)
 # list(APPEND EXAMPLE_FLATMM_COMPILE_OPTIONS -Wno-undefined-func-template -Wno-float-equal)
 list(APPEND EXAMPLE_FLATMM_COMPILE_OPTIONS -Wno-unused-variable -Wno-unused-parameter)
+if(CK_USE_OCP_FP8)
+    list(APPEND EXAMPLE_GEMM_COMPILE_OPTIONS -DCK_TILE_USE_OCP_FP8)
+endif()
 # list(APPEND EXAMPLE_FLATMM_COMPILE_OPTIONS -DUSING_MFMA_16x16x32=1 -DENABLE_FP8=1 -Wno-unused-local-typedef)
 # list(APPEND EXAMPLE_FLATMM_COMPILE_OPTIONS -DUSING_MFMA_32x32x16=1 -DENABLE_FP8=1 -Wno-unused-local-typedef)
 list(APPEND EXAMPLE_FLATMM_COMPILE_OPTIONS -DUSING_MFMA_16x16x128=1 -DENABLE_FP8=1 -Wno-unused-local-typedef)
diff --git a/example/ck_tile/18_flatmm/flatmm_basic.hpp b/example/ck_tile/18_flatmm/flatmm_basic.hpp
index f550f5a04d..c1ea33c110 100644
--- a/example/ck_tile/18_flatmm/flatmm_basic.hpp
+++ b/example/ck_tile/18_flatmm/flatmm_basic.hpp
@@ -35,7 +35,7 @@ template <typename DataType>
 struct GemmConfig
 {
     static constexpr ck_tile::index_t M_Tile = 128;
-    static constexpr ck_tile::index_t N_Tile = 128;
+    static constexpr ck_tile::index_t N_Tile = 256;
     static constexpr ck_tile::index_t K_Tile = 256;
 
     static constexpr ck_tile::index_t M_Warp = 1;