diff --git a/StormLib/CMakeLists.txt b/StormLib/CMakeLists.txt
index 5d8d50f3..5f7cfe48 100644
--- a/StormLib/CMakeLists.txt
+++ b/StormLib/CMakeLists.txt
@@ -302,11 +302,6 @@ else()
     endif()
 endif()
 
-if(${CMAKE_SYSTEM_NAME} STREQUAL FreeBSD)
-    message(STATUS "Using FreeBSD port")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DO_LARGEFILE=0 -Dstat64=stat -Dlstat64=lstat -Dlseek64=lseek -Doff64_t=off_t -Dfstat64=fstat -Dftruncate64=ftruncate")
-endif()
-
 add_library(${LIBRARY_NAME} ${LIB_TYPE} ${SRC_FILES} ${SRC_ADDITIONAL_FILES} ${STORM_DEF_FILES})
 
 target_link_libraries(${LIBRARY_NAME} ${LINK_LIBS})
diff --git a/StormLib/src/StormPort.h b/StormLib/src/StormPort.h
index d3864142..4740526e 100644
--- a/StormLib/src/StormPort.h
+++ b/StormLib/src/StormPort.h
@@ -358,8 +358,8 @@
 
 #endif // !STORMLIB_WINDOWS
 
-// 64-bit calls are supplied by "normal" calls on Mac
-#if defined(STORMLIB_MAC)
+// 64-bit calls are supplied by "normal" calls on *BSD and derivatives
+#if defined(STORMLIB_MAC) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
   #define stat64  stat
   #define fstat64 fstat
   #define lseek64 lseek