diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d2828ed99..04e34f187f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -237,7 +237,7 @@ string (REGEX REPLACE ".*#define[ \t]+H5_VERS_MINOR[ \t]+([0-9]*).*$"
     "\\1" H5_VERS_MINOR ${_h5public_h_contents})
 string (REGEX REPLACE ".*#define[ \t]+H5_VERS_RELEASE[ \t]+([0-9]*).*$"
     "\\1" H5_VERS_RELEASE ${_h5public_h_contents})
-string (REGEX REPLACE ".*#define[ \t]+H5_VERS_SUBRELEASE[ \t]+\"([0-9A-Za-z._\-]*)\".*$"
+string (REGEX REPLACE ".*#define[ \t]+H5_VERS_SUBRELEASE[ \t]+\"([0-9A-Za-z._-]*)\".*$"
     "\\1" H5_VERS_SUBRELEASE ${_h5public_h_contents})
 if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.15.0")
   message (TRACE "VERSION: ${H5_VERS_MAJOR}.${H5_VERS_MINOR}.${H5_VERS_RELEASE}-${H5_VERS_SUBRELEASE}")