diff --git a/old/GenerateExportHeader.cmake b/cmake/GenerateExportHeader.cmake
index a91da06..2406354 100644
--- a/old/GenerateExportHeader.cmake
+++ b/cmake/GenerateExportHeader.cmake
@@ -164,7 +164,7 @@ macro(_test_compiler_hidden_visibility)
   if(CMAKE_COMPILER_IS_GNUCXX)
     exec_program(${CMAKE_C_COMPILER} ARGS --version
       OUTPUT_VARIABLE _gcc_version_info)
-    string(REGEX MATCH "[345]\\.[0-9]\\.[0-9]"
+    string(REGEX MATCH "[34567]\\.[0-9]\\.[0-9]"
       _gcc_version "${_gcc_version_info}")
     # gcc on mac just reports: "gcc (GCC) 3.3 20030304 ..." without the
     # patch level, handle this here: