diff --git a/file.c b/file.c
index 16d4df1bfb..50d1765d02 100644
--- a/file.c
+++ b/file.c
@@ -146,6 +146,11 @@ int flock(int, int);
 #  define UTIME_EINVAL
 #endif
 
+/* Solaris 10 realpath(3) doesn't support File.realpath */
+#if defined HAVE_REALPATH && defined __sun && defined __SVR4
+#undef HAVE_REALPATH
+#endif
+
 #ifdef HAVE_REALPATH
 #include <limits.h>
 #include <stdlib.h>