--- ./git-compat-util.h.orig	2021-06-01 09:38:32 +0000
+++ ./git-compat-util.h	2021-06-01 09:42:52 +0000
@@ -277,13 +277,15 @@
 }
 #endif
 
+#ifdef _AIX51
+#define NO_LIBGEN_H
+#endif
+
 #ifndef NO_LIBGEN_H
 #include <libgen.h>
 #else
-#define basename gitbasename
-char *gitbasename(char *);
-#define dirname gitdirname
-char *gitdirname(char *);
+char *basename(char *);
+char *dirname(char *);
 #endif
 
 #ifndef NO_ICONV