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-rw-r--r--cmake/opentrack-word-size.cmake1
1 files changed, 1 insertions, 0 deletions
diff --git a/cmake/opentrack-word-size.cmake b/cmake/opentrack-word-size.cmake
index 4ed82e02..e539f1cd 100644
--- a/cmake/opentrack-word-size.cmake
+++ b/cmake/opentrack-word-size.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
if(CMAKE_SIZEOF_VOID_P GREATER 4)
set(opentrack-64bit TRUE)
else()