diff --git a/ltdl.c b/ltdl.c
index 9b4dccb..4ea9abf 100644
--- a/ltdl.c
+++ b/ltdl.c
@@ -654,6 +654,10 @@ int lt_dlopen_flag = 0;
 #  include <dl.h>
 #endif
 
+#ifdef HAVE_SYS_DL_H
+#  include <sys/dl.h>
+#endif
+
 /* some flags are missing on some systems, so we provide
  * harmless defaults.
  *