diff --git a/grive/CMakeLists.txt b/grive/CMakeLists.txt
index 37145f1..32dd16b 100644
--- a/grive/CMakeLists.txt
+++ b/grive/CMakeLists.txt
@@ -27,8 +27,8 @@ set_target_properties( grive_executable
 
 install(TARGETS grive_executable RUNTIME DESTINATION bin)
 
-if ( ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD" )
+if ( ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" OR ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD" )
     install(FILES doc/grive.1 DESTINATION man/man1 )
-else ( ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD" )
+else ( ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" OR ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD" )
     install(FILES doc/grive.1 DESTINATION share/man/man1 )
-endif( ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD" )
+endif( ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" OR ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD" )
diff --git a/libgrive/src/util/File.cc b/libgrive/src/util/File.cc
index 93345ac..c5184ec 100644
--- a/libgrive/src/util/File.cc
+++ b/libgrive/src/util/File.cc
@@ -33,7 +33,7 @@
 #include <sys/types.h>
 #include <fcntl.h>
 
-#ifdef __OpenBSD__
+#if defined(__FreeBSD__) || defined(__OpenBSD__)
 #include <unistd.h>
 #endif