diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 559b4dc..1d7e7bf 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -184,7 +184,7 @@ cmake_dependent_option(
 if(WIN32)
     add_definitions(-DXR_OS_WINDOWS)
     add_definitions(-DNOMINMAX)
-elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
     add_definitions(-DXR_OS_LINUX)
 elseif(ANDROID)
     add_definitions(-DXR_OS_ANDROID)
diff --git a/src/loader/CMakeLists.txt b/src/loader/CMakeLists.txt
index 073e07b..d21471a 100644
--- a/src/loader/CMakeLists.txt
+++ b/src/loader/CMakeLists.txt
@@ -154,7 +154,7 @@ if(ANDROID)
     # Force 16KB page sizes for Android 15+ compatibility.
     target_link_options(openxr_loader PRIVATE "-Wl,-z,max-page-size=16384")
 
-elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
     set(FALLBACK_CONFIG_DIRS
         "/etc/xdg"
         CACHE