diff --git a/platformdefinitions.cmake b/platformdefinitions.cmake
index ed3d9f6..6b0628f 100644
--- a/platformdefinitions.cmake
+++ b/platformdefinitions.cmake
@@ -7,17 +7,21 @@ if (CLR_CMAKE_PLATFORM_ARCH_AMD64)
   add_definitions(-DAMD64)
   add_definitions(-DBIT64=1)          # CoreClr <= 3.x
   add_definitions(-DHOST_64BIT=1)     # CoreClr > 3.x
+  add_definitions(-DHOST_AMD64)
 elseif (CLR_CMAKE_PLATFORM_ARCH_I386)
   add_definitions(-D_X86_)
+  add_definitions(-DHOST_X86)
 elseif (CLR_CMAKE_PLATFORM_ARCH_ARM)
   add_definitions(-D_ARM_)
   add_definitions(-DARM)
+  add_definitions(-DHOST_ARM)
 elseif (CLR_CMAKE_PLATFORM_ARCH_ARM64)
   add_definitions(-D_ARM64_)
   add_definitions(-DARM64)
   add_definitions(-D_WIN64)
   add_definitions(-DBIT64=1)          # CoreClr <= 3.x
   add_definitions(-DHOST_64BIT=1)     # CoreClr > 3.x
+  add_definitions(-DHOST_ARM64)
 else ()
   clr_unknown_arch()
 endif ()