diff --git a/src/meson.build b/src/meson.build
index 9ee2006621dbc799dbc6d6c32a55d1688efdba88..ecf7db5a8e4ac944d56db1429a3037ba0d858ea0 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -20,6 +20,7 @@ if not cpp_compiler.has_header('FlexLexer.h')
     	  fs.parent(fs.parent(flex_exe.full_path())) / 'include' / 'FlexLexer.h', 
     	  'FlexLexer.h'
 	  )
+  flexlexer_h = 'FlexLexer.h'
 else
   flexlexer_h = []
 endif