diff --git a/CMake/FindMuParser.cmake b/CMake/FindMuParser.cmake
index 13065460e6367a0fe93dc7dde39d0888c7156456..eccc86803c7b6e403304699b1c73ea5734422c67 100644
--- a/CMake/FindMuParser.cmake
+++ b/CMake/FindMuParser.cmake
@@ -47,7 +47,7 @@ if(EXISTS "${MUPARSER_INCLUDE_DIR}/muParserDef.h")
     MUPARSER_VERSION_OLD_STYLE "${_muParserDef_h_CONTENTS}")
 
   # Try to find the version for muparser >= 2.3
-  string(REGEX REPLACE ".*static *const *string_type *ParserVersion *= *string_type\\(_T\\(\"([0-9.]+)\"\\)\\);.*" 
+  string(REGEX REPLACE ".*static *const *string_type *ParserVersion *= *string_type\\(_T\\(\"([0-9.]+)([^0-9.]+)?\"\\)\\);.*" 
       "\\1" MUPARSER_VERSION "${MUPARSER_VERSION_OLD_STYLE}")
   
   if(MUPARSER_VERSION MATCHES "^[0-9]+\$")