diff --git a/magick/nt-base.c b/magick/nt-base.c
index da160b2e2a..813ac7c0dd 100644
--- a/magick/nt-base.c
+++ b/magick/nt-base.c
@@ -2259,9 +2259,6 @@ MagickPrivate int NTSystemCommand(const char *command,char *output)
   PROCESS_INFORMATION
     process_info;
 
-  SECURITY_ATTRIBUTES
-    sa;
-
   size_t
     output_offset;
 
@@ -2291,9 +2288,6 @@ MagickPrivate int NTSystemCommand(const char *command,char *output)
       read_output=(HANDLE) NULL;
       if (output != (char *) NULL)
         {
-          sa.nLength=sizeof(SECURITY_ATTRIBUTES);
-          sa.bInheritHandle=TRUE;
-          sa.lpSecurityDescriptor=NULL;
           if (CreatePipe(&read_output,&write_output,NULL,0))
             {
               if (SetHandleInformation(write_output,HANDLE_FLAG_INHERIT,