diff --git a/ports/cmake/src/CMakeLists.txt b/ports/cmake/src/CMakeLists.txt
index b843152..b8ff89b 100644
--- a/ports/cmake/src/CMakeLists.txt
+++ b/ports/cmake/src/CMakeLists.txt
@@ -39,8 +39,6 @@ check_include_file("termios.h" HAVE_TERMIOS)
 check_include_file("unistd.h" HAVE_UNISTD_H)
 check_include_file("windows.h" HAVE_WINDOWS_H)
 
-check_symbol_exists(strerror "string.h" HAVE_STRERROR)
-
 function(check_m)
     set(CMAKE_REQUIRED_LIBRARIES m)
     check_function_exists(sin HAVE_M)
@@ -59,6 +57,7 @@ check_function_exists(shmget HAVE_SHMGET)
 check_function_exists(shmat HAVE_SHMAT)
 check_function_exists(shmdt HAVE_SHMDT)
 check_function_exists(shmctl HAVE_SHMCTL)
+check_function_exists(strerror HAVE_STRERROR)
 
 search_libs(gethostbyname GETHOSTBYNAME_LIB nsl socket network)
 search_libs(socket SOCKET_LIB socket)