--- git-compat-util.h.ORG	2016-06-02 06:14:56.000000000 -0500
+++ git-compat-util.h	2016-06-02 06:16:55.000000000 -0500
@@ -255,14 +255,15 @@
 #ifdef NO_SETITIMER
 #define setitimer(which,value,ovalue)
 #endif
+#ifdef _AIX51
+#define NO_LIBGEN_H
+#endif
 
 #ifndef NO_LIBGEN_H
 #include <libgen.h>
 #else
-#define basename gitbasename
-extern char *gitbasename(char *);
-#define dirname gitdirname
-extern char *gitdirname(char *);
+extern char *basename(char *);
+extern char *dirname(char *);
 #endif
 
 #ifndef NO_ICONV