--- a/src/softmagic.c	2020-11-26 11:06:32 +0100
+++ b/src/softmagic.c	2020-11-26 11:07:19 +0100
@@ -487,8 +487,8 @@
 	return rv;
 }
 
-#if !defined(HAVE_STRNDUP) || defined(__aiws__)
-# ifdef __aiws__
+#if !defined(HAVE_STRNDUP) || defined(__aiws__) || defined(_AIX)
+# if defined(__aiws__) || defined(_AIX)
 #  define strndup aix_strndup	/* aix is broken */
 # endif
 char *strndup(const char *, size_t);