1 files changed, 3 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1fcf0874f..bcd169643 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -160,6 +160,9 @@ set_property(DIRECTORY APPEND PROPERTY
     COMPILE_DEFINITIONS $<$<CONFIG:Debug>:_DEBUG> $<$<NOT:$<CONFIG:Debug>>:NDEBUG>)
 
 
+math(EXPR EMU_ARCH_BITS ${CMAKE_SIZEOF_VOID_P}*8)
+add_definitions(-DEMU_ARCH_BITS=${EMU_ARCH_BITS})
+
 # System imported libraries
 # ======================