diff --git a/math/lexer.mll b/math/lexer.mll
index b03e273..fb76718 100644
--- a/math/lexer.mll
+++ b/math/lexer.mll
@@ -69,7 +69,7 @@ rule token = parse
   | "\\" (latex_function_names as name) space * "["  { LITERAL (HTMLABLEC(FONT_UFH,"\\" ^ name ^ "[", name ^ "[")) }  
   | "\\" (latex_function_names as name) space * "\\{"  { LITERAL (HTMLABLEC(FONT_UFH,"\\" ^ name ^ "\\{", name ^ "{")) }
   | "\\" (latex_function_names as name) space * { LITERAL (HTMLABLEC(FONT_UFH,"\\" ^ name ^ " ", name ^ " ")) }
-  | "\\" (mediawiki_function_names as name) space * "("    { (Texutil.tex_use_ams(); LITERAL (HTMLABLEC(FONT_UFH,"\\operatorname{" ^ name ^ "}(", name^ "("))) }  
+  | "\\" (mediawiki_function_names as name) space * "("    { (Texutil.tex_use_ams(); LITERAL (HTMLABLEC(FONT_UFH,"\\operatorname{" ^ name ^ "}(", name^ "("))) }
   | "\\" (mediawiki_function_names as name) space * "["    { (Texutil.tex_use_ams(); LITERAL (HTMLABLEC(FONT_UFH,"\\operatorname{" ^ name ^ "}[", name^ "["))) }
   | "\\" (mediawiki_function_names as name) space * "\\{"  { (Texutil.tex_use_ams(); LITERAL (HTMLABLEC(FONT_UFH,"\\operatorname{" ^ name ^ "}\\{", name^ "{"))) }
   | "\\" (mediawiki_function_names as name) space *        { (Texutil.tex_use_ams(); LITERAL (HTMLABLEC(FONT_UFH,"\\operatorname{" ^ name ^ "} ", name ^ " "))) }
diff --git a/texvccheck/texutil.ml b/texvccheck/texutil.ml
index 2431219..9aebd7c 100644
--- a/texvccheck/texutil.ml
+++ b/texvccheck/texutil.ml
@@ -606,7 +606,7 @@ let find cmd = match cmd with
   | "\\N" -> LITERAL ( TEX_ONLY( "\\mathbb{N}" ^ " " ) )
   | "\\Q" -> LITERAL ( TEX_ONLY( "\\mathbb{Q}" ^ " " ) )
   | "\\R" -> LITERAL ( TEX_ONLY( "\\mathbb{R}" ^ " " ) )
-  | "\\Z" -> LITERAL ( TEX_ONLY( "\\mathbb{Z }" ^ " " ) )
+  | "\\Z" -> LITERAL ( TEX_ONLY( "\\mathbb{Z}" ^ " " ) )
 
   | "\\darr" -> DELIMITER( TEX_ONLY( "\\downarrow" ^ " " ) )
   | "\\dArr" -> DELIMITER( TEX_ONLY( "\\Downarrow" ^ " " ) )