diff --git a/CMakeLists.txt b/CMakeLists.txt
index 12e66d0..9aea4ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,10 +36,14 @@ else()
     set(OPENSSL_API_1_1 OFF)
 endif()
 
+IF(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
+    set(SED_FREEBSD "*.c")
+ENDIF(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
+
 if(BUNDLE_CIVETWEB)
     ExternalProject_Add( civetweb
        GIT_REPOSITORY https://github.com/kakwa/civetweb
-       PATCH_COMMAND sed -i s/__DATE__/"110973"/ src/main.c src/civetweb.c
+       PATCH_COMMAND sed -i ${SED_FREEBSD} s/__DATE__/"110973"/ src/main.c src/civetweb.c
        INSTALL_DIR /usr/local
        CMAKE_ARGS .. -DCMAKE_INSTALL_PREFIX=/usr
         -DCIVETWEB_DISABLE_CGI=ON