diff --git a/lib/libc/stdlib/abort.c b/lib/libc/stdlib/abort.c
index 022c6aa99a72..2335c400da77 100644
--- a/lib/libc/stdlib/abort.c
+++ b/lib/libc/stdlib/abort.c
@@ -44,7 +44,7 @@ __FBSDID("$FreeBSD$");
 #include "libc_private.h"
 
 void
-abort()
+abort(void)
 {
 	struct sigaction act;
 
diff --git a/lib/libc/stdlib/abs.c b/lib/libc/stdlib/abs.c
index 87589474eb3c..367b114f745d 100644
--- a/lib/libc/stdlib/abs.c
+++ b/lib/libc/stdlib/abs.c
@@ -36,8 +36,7 @@ __FBSDID("$FreeBSD$");
 #include <stdlib.h>
 
 int
-abs(j)
-	int j;
+abs(int j)
 {
 	return(j < 0 ? -j : j);
 }
diff --git a/lib/libc/stdlib/atof.c b/lib/libc/stdlib/atof.c
index 3514ae3b6927..0458eb968331 100644
--- a/lib/libc/stdlib/atof.c
+++ b/lib/libc/stdlib/atof.c
@@ -42,16 +42,13 @@ __FBSDID("$FreeBSD$");
 #include <xlocale.h>
 
 double
-atof(ascii)
-	const char *ascii;
+atof(const char *ascii)
 {
 	return strtod(ascii, (char **)NULL);
 }
 
 double
-atof_l(ascii, locale)
-	const char *ascii;
-	locale_t locale;
+atof_l(const char *ascii, locale_t locale)
 {
 	return strtod_l(ascii, (char **)NULL, locale);
 }
diff --git a/lib/libc/stdlib/atoi.c b/lib/libc/stdlib/atoi.c
index 564273e952cf..9f92fcdad4be 100644
--- a/lib/libc/stdlib/atoi.c
+++ b/lib/libc/stdlib/atoi.c
@@ -42,16 +42,13 @@ __FBSDID("$FreeBSD$");
 #include <xlocale.h>
 
 int
-atoi(str)
-	const char *str;
+atoi(const char *str)
 {
 	return (int)strtol(str, (char **)NULL, 10);
 }
 
 int
-atoi_l(str, locale)
-	const char *str;
-	locale_t locale;
+atoi_l(const char *str, locale_t locale)
 {
 	return (int)strtol_l(str, (char **)NULL, 10, locale);
 }
diff --git a/lib/libc/stdlib/atol.c b/lib/libc/stdlib/atol.c
index d30aa18a8398..bd8ef07c544d 100644
--- a/lib/libc/stdlib/atol.c
+++ b/lib/libc/stdlib/atol.c
@@ -42,16 +42,13 @@ __FBSDID("$FreeBSD$");
 #include <xlocale.h>
 
 long
-atol(str)
-	const char *str;
+atol(const char *str)
 {
 	return strtol(str, (char **)NULL, 10);
 }
 
 long
-atol_l(str, locale)
-	const char *str;
-	locale_t locale;
+atol_l(const char *str, locale_t locale)
 {
 	return strtol_l(str, (char **)NULL, 10, locale);
 }
diff --git a/lib/libc/stdlib/atoll.c b/lib/libc/stdlib/atoll.c
index af528382bd7c..093fde5d9f91 100644
--- a/lib/libc/stdlib/atoll.c
+++ b/lib/libc/stdlib/atoll.c
@@ -39,16 +39,13 @@ __FBSDID("$FreeBSD$");
 #include <xlocale.h>
 
 long long
-atoll(str)
-	const char *str;
+atoll(const char *str)
 {
 	return strtoll(str, (char **)NULL, 10);
 }
 
 long long
-atoll_l(str, locale)
-	const char *str;
-	locale_t locale;
+atoll_l(const char *str, locale_t locale)
 {
 	return strtoll_l(str, (char **)NULL, 10, locale);
 }
diff --git a/lib/libc/stdlib/bsearch.c b/lib/libc/stdlib/bsearch.c
index 4a1dd525a67d..8303f971b562 100644
--- a/lib/libc/stdlib/bsearch.c
+++ b/lib/libc/stdlib/bsearch.c
@@ -61,20 +61,12 @@ __FBSDID("$FreeBSD$");
  */
 #ifdef I_AM_BSEARCH_B
 void *
-bsearch_b(key, base0, nmemb, size, compar)
-	const void *key;
-	const void *base0;
-	size_t nmemb;
-	size_t size;
-	DECLARE_BLOCK(int, compar, const void *, const void *);
+bsearch_b(const void *key, const void *base0, size_t nmemb, size_t size,
+    DECLARE_BLOCK(int, compar, const void *, const void *))
 #else
 void *
-bsearch(key, base0, nmemb, size, compar)
-	const void *key;
-	const void *base0;
-	size_t nmemb;
-	size_t size;
-	int (*compar)(const void *, const void *);
+bsearch(const void *key, const void *base0, size_t nmemb, size_t size,
+    int (*compar)(const void *, const void *))
 #endif
 {
 	const char *base = base0;
diff --git a/lib/libc/stdlib/exit.c b/lib/libc/stdlib/exit.c
index 145eb9d7c7cb..a656e04586c0 100644
--- a/lib/libc/stdlib/exit.c
+++ b/lib/libc/stdlib/exit.c
@@ -56,8 +56,7 @@ int	__isthreaded	= 0;
  * Exit, flushing stdio buffers if necessary.
  */
 void
-exit(status)
-	int status;
+exit(int status)
 {
 	/* Ensure that the auto-initialization routine is linked in: */
 	extern int _thread_autoinit_dummy_decl;
diff --git a/lib/libc/stdlib/labs.c b/lib/libc/stdlib/labs.c
index 816370eee2b2..ef068826c2f3 100644
--- a/lib/libc/stdlib/labs.c
+++ b/lib/libc/stdlib/labs.c
@@ -36,8 +36,7 @@ __FBSDID("$FreeBSD$");
 #include <stdlib.h>
 
 long
-labs(j)
-	long j;
+labs(long j)
 {
 	return(j < 0 ? -j : j);
 }
diff --git a/lib/libc/stdlib/qsort.c b/lib/libc/stdlib/qsort.c
index e97ea9272dd6..08816887cf79 100644
--- a/lib/libc/stdlib/qsort.c
+++ b/lib/libc/stdlib/qsort.c
@@ -64,9 +64,7 @@ static inline void	 swapfunc(char *, char *, int, int, int);
 	es % sizeof(TYPE) ? 2 : es == sizeof(TYPE) ? 0 : 1;
 
 static inline void
-swapfunc(a, b, n, swaptype_long, swaptype_int)
-	char *a, *b;
-	int n, swaptype_long, swaptype_int;
+swapfunc( char *a, char *b, int n, int swaptype_long, int swaptype_int)
 {
 	if (swaptype_long <= 1)
 		swapcode(long, a, b, n)
diff --git a/lib/libc/stdlib/rand.c b/lib/libc/stdlib/rand.c
index 4f4aa8dc2d91..b8871a2a4a46 100644
--- a/lib/libc/stdlib/rand.c
+++ b/lib/libc/stdlib/rand.c
@@ -111,14 +111,13 @@ static u_long next =
 #endif
 
 int
-rand()
+rand(void)
 {
 	return (do_rand(&next));
 }
 
 void
-srand(seed)
-u_int seed;
+srand(u_int seed)
 {
 	next = seed;
 #ifndef USE_WEAK_SEEDING
@@ -136,7 +135,7 @@ u_int seed;
  * data from the kernel.
  */
 void
-sranddev()
+sranddev(void)
 {
 	int mib[2];
 	size_t len;
diff --git a/lib/libc/stdlib/tfind.c b/lib/libc/stdlib/tfind.c
index c5d66cf41612..0ad391e79981 100644
--- a/lib/libc/stdlib/tfind.c
+++ b/lib/libc/stdlib/tfind.c
@@ -23,12 +23,15 @@ __FBSDID("$FreeBSD$");
 #include <stdlib.h>
 #include <search.h>
 
-/* find a node, or return 0 */
+/* 
+ * find a node, or return 0
+ *
+ * vkey   - key to be found 
+ * vrootp - address of the tree root 
+ */
 void *
-tfind(vkey, vrootp, compar)
-	const void *vkey;		/* key to be found */
-	void * const *vrootp;		/* address of the tree root */
-	int (*compar)(const void *, const void *);
+tfind(const void *vkey, void * const *vrootp,
+    int (*compar)(const void *, const void *))
 {
 	node_t **rootp = (node_t **)vrootp;