diff --git a/gk_arch.h b/gk_arch.h
index 122e087..c8a322f 100644
--- a/gk_arch.h
+++ b/gk_arch.h
@@ -42,7 +42,9 @@
 #endif
   #include <inttypes.h>
   #include <sys/types.h>
+#ifndef _WIN32 # MinGW
   #include <sys/resource.h>
+#endif
   #include <sys/time.h>
   #include <unistd.h>
 #endif
diff --git a/gk_getopt.h b/gk_getopt.h
index 4bb8611..cc416ab 100644
--- a/gk_getopt.h
+++ b/gk_getopt.h
@@ -52,10 +52,10 @@ struct gk_option {
 
 
 /* Function prototypes */
-extern int gk_getopt(int __argc, char **__argv, char *__shortopts);
-extern int gk_getopt_long(int __argc, char **__argv, char *__shortopts,
+extern int gk_getopt(int argc, char ** argv, char *__shortopts);
+extern int gk_getopt_long(int argc, char ** argv, char *__shortopts,
               struct gk_option *__longopts, int *__longind);
-extern int gk_getopt_long_only (int __argc, char **__argv,
+extern int gk_getopt_long_only (int argc, char ** argv,
               char *__shortopts, struct gk_option *__longopts, int *__longind);