diff --git a/compat/fgetln.c b/compat/fgetln.c
index 27bc01b6..08ddc840 100644
--- a/compat/fgetln.c
+++ b/compat/fgetln.c
@@ -43,9 +43,7 @@
 #include "tmux.h"
 
 char *
-fgetln(fp, len)
-	FILE *fp;
-	size_t *len;
+fgetln(FILE *fp, size_t *len)
 {
 	static char *buf = NULL;
 	static size_t bufsiz = 0;
diff --git a/compat/getopt.c b/compat/getopt.c
index f6ecb588..3a532372 100644
--- a/compat/getopt.c
+++ b/compat/getopt.c
@@ -52,10 +52,7 @@ char	*BSDoptarg;		/* argument associated with option */
  *	Parse argc/argv argument vector.
  */
 int
-BSDgetopt(nargc, nargv, ostr)
-	int nargc;
-	char * const *nargv;
-	const char *ostr;
+BSDgetopt(int nargc, char *const *nargv, const char *ostr)
 {
 	static char *place = EMSG;		/* option letter processing */
 	char *oli;				/* option letter list index */