diff --git a/Auxiliary/DirectXTexEXR.cpp b/Auxiliary/DirectXTexEXR.cpp
index e74d95b..e0a5a8f 100644
--- a/Auxiliary/DirectXTexEXR.cpp
+++ b/Auxiliary/DirectXTexEXR.cpp
@@ -1,7 +1,7 @@
 //--------------------------------------------------------------------------------------
 // File: DirectXTexEXR.cpp
 //
-// DirectXTex Auxillary functions for using the OpenEXR library
+// DirectXTex Auxilary functions for using the OpenEXR library
 //
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
diff --git a/Auxiliary/DirectXTexEXR.h b/Auxiliary/DirectXTexEXR.h
index bec66e8..d0d9417 100644
--- a/Auxiliary/DirectXTexEXR.h
+++ b/Auxiliary/DirectXTexEXR.h
@@ -1,7 +1,7 @@
 //--------------------------------------------------------------------------------------
 // File: DirectXTexEXR.h
 //
-// DirectXTex Auxillary functions for using the OpenEXR library
+// DirectXTex Auxilary functions for using the OpenEXR library
 //
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
diff --git a/Auxiliary/DirectXTexXbox.h b/Auxiliary/DirectXTexXbox.h
index f2b244c..4e28393 100644
--- a/Auxiliary/DirectXTexXbox.h
+++ b/Auxiliary/DirectXTexXbox.h
@@ -1,7 +1,7 @@
 //--------------------------------------------------------------------------------------
 // File: DirectXTexXbox.h
 //
-// DirectXTex Auxillary functions for Xbox texture processing
+// DirectXTex Auxilary functions for Xbox texture processing
 //
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
diff --git a/Auxiliary/DirectXTexXboxD3D11X.cpp b/Auxiliary/DirectXTexXboxD3D11X.cpp
index b6b826b..d511bc5 100644
--- a/Auxiliary/DirectXTexXboxD3D11X.cpp
+++ b/Auxiliary/DirectXTexXboxD3D11X.cpp
@@ -1,7 +1,7 @@
 //-------------------------------------------------------------------------------------
 // DirectXTexD3D11X.cpp
 //  
-// DirectXTex Auxillary functions for creating resouces from XboxImage containers
+// DirectXTex Auxilary functions for creating resouces from XboxImage containers
 // via the CreatePlacement APIs
 //
 // Copyright (c) Microsoft Corporation.
diff --git a/Auxiliary/DirectXTexXboxD3D12X.cpp b/Auxiliary/DirectXTexXboxD3D12X.cpp
index 0053d79..dba250e 100644
--- a/Auxiliary/DirectXTexXboxD3D12X.cpp
+++ b/Auxiliary/DirectXTexXboxD3D12X.cpp
@@ -1,7 +1,7 @@
 //-------------------------------------------------------------------------------------
 // DirectXTexD3D12X.cpp
 //  
-// DirectXTex Auxillary functions for creating resouces from XboxImage containers
+// DirectXTex Auxilary functions for creating resouces from XboxImage containers
 // via the CreatePlacedResourceX API
 //
 // Copyright (c) Microsoft Corporation.
diff --git a/Auxiliary/DirectXTexXboxDDS.cpp b/Auxiliary/DirectXTexXboxDDS.cpp
index 53ab2d3..d7c23bc 100644
--- a/Auxiliary/DirectXTexXboxDDS.cpp
+++ b/Auxiliary/DirectXTexXboxDDS.cpp
@@ -1,7 +1,7 @@
 //--------------------------------------------------------------------------------------
 // File: DirectXTexXboxDDS.cpp
 //
-// DirectXTex Auxillary functions for saving "XBOX" Xbox variants of DDS files
+// DirectXTex Auxilary functions for saving "XBOX" Xbox variants of DDS files
 //
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
diff --git a/Auxiliary/DirectXTexXboxDetile.cpp b/Auxiliary/DirectXTexXboxDetile.cpp
index 43da57a..06fd914 100644
--- a/Auxiliary/DirectXTexXboxDetile.cpp
+++ b/Auxiliary/DirectXTexXboxDetile.cpp
@@ -1,7 +1,7 @@
 //--------------------------------------------------------------------------------------
 // File: DirectXTexXboxDetile.cpp
 //
-// DirectXTex Auxillary functions for converting from Xbox tiled to linear
+// DirectXTex Auxilary functions for converting from Xbox tiled to linear
 //
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
diff --git a/Auxiliary/DirectXTexXboxImage.cpp b/Auxiliary/DirectXTexXboxImage.cpp
index 05b05be..bbe4149 100644
--- a/Auxiliary/DirectXTexXboxImage.cpp
+++ b/Auxiliary/DirectXTexXboxImage.cpp
@@ -1,7 +1,7 @@
 //--------------------------------------------------------------------------------------
 // File: DirectXTexXboxImage.cpp
 //
-// DirectXTex Auxillary functions for Xbox texture blob
+// DirectXTex Auxilary functions for Xbox texture blob
 //
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
diff --git a/Auxiliary/DirectXTexXboxTile.cpp b/Auxiliary/DirectXTexXboxTile.cpp
index 421463a..99c452d 100644
--- a/Auxiliary/DirectXTexXboxTile.cpp
+++ b/Auxiliary/DirectXTexXboxTile.cpp
@@ -1,7 +1,7 @@
 //--------------------------------------------------------------------------------------
 // File: DirectXTexXboxTile.cpp
 //
-// DirectXTex Auxillary functions for converting from linear to Xbox tiling
+// DirectXTex Auxilary functions for converting from linear to Xbox tiling
 //
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e0fbb31..3bf25cc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -422,7 +422,7 @@ if(BUILD_TOOLS AND WIN32)
     foreach(t IN LISTS TOOL_EXES)
       target_include_directories(${t} PRIVATE Auxiliary)
       target_link_libraries(${t} PRIVATE ${OPENEXR_ILMIMF_LIBRARY})
-      target_compile_options(${t} PRIVATE -DUSE_OPENEXR)
+      target_compile_definitions(${t} PRIVATE USE_OPENEXR)
     endforeach()
   endif()
 endif()