diff --git a/preload/interface.master b/preload/interface.master
index 55a9481..21b9734 100644
--- a/preload/interface.master
+++ b/preload/interface.master
@@ -407,7 +407,8 @@ WRAP: int rmdir(const char *pathname) : \
 #ifdef HAVE_SCANDIR
 #ifdef HAVE_LINUX_SCANDIR
 WRAP: int scandir(const char *dir, struct dirent ***namelist, \
-	SCANDIR_TYPE_ARG3, int(*compar)(const void *, const void *)) : \
+	SCANDIR_TYPE_ARG3, \
+	int(*compar)(const struct dirent **, const struct dirent **)) : \
 	map(dir) hardcode_param(3,filter)
 #endif
 #ifdef HAVE_OSX_SCANDIR
@@ -417,7 +418,7 @@ WRAP: int scandir(const char *dirname, struct dirent ***namelist, int (*select)(
 #ifdef HAVE_SCANDIR64
 WRAP: int scandir64(const char *dir, struct dirent64 ***namelist, \
 	int(*filter)(const struct dirent64 *), \
-	int(*compar)(const void *, const void *)) : \
+	int(*compar)(const struct dirent64 **, const struct dirent64 **)) : \
 	map(dir)
 #endif
 #ifdef HAVE_SETXATTR