diff --git a/winsup/testsuite/ChangeLog b/winsup/testsuite/ChangeLog
index 7b2ec1a81..bfe7413c3 100644
--- a/winsup/testsuite/ChangeLog
+++ b/winsup/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2005-05-17  Brian Dessent  <brian@dessent.net>
+
+	* winsup.api/signal-into-win32-api.c (main): Use 'NULL' instead of '0'
+	in argument list to avoid compiler warning with gcc4.
+	* winsup.api/ltp/execle01.c (main): Ditto.
+	* winsup.api/ltp/execlp01.c (main): Ditto.
+	* winsup.api/ltp/fcntl07.c (do_exec): Ditto.
+	* winsup.api/ltp/fcntl07B.c (do_exec): Ditto.
+
 2005-02-10  Christopher Faylor  <cgf@timesys.com>
 
 	* winsup.api/known_bugs.tcl: Remove dup05, fcntl07B, lseek04, select03,
diff --git a/winsup/testsuite/winsup.api/ltp/execle01.c b/winsup/testsuite/winsup.api/ltp/execle01.c
index f7fcc8237..ca2cdec4e 100644
--- a/winsup/testsuite/winsup.api/ltp/execle01.c
+++ b/winsup/testsuite/winsup.api/ltp/execle01.c
@@ -172,7 +172,7 @@ main(int ac, char **av)
 	 */
 	switch(pid=fork()) {
 	case 0: 	/* CHILD - Call execle(2) */
-	    execle("test", "test", 0, environ);
+	    execle("test", "test", NULL, environ);
 	    /* should not get here!! if we do, the parent will fail the Test Case */
 	    exit(errno);	
 	case -1:	/* ERROR!!! exit now!!*/
diff --git a/winsup/testsuite/winsup.api/ltp/execlp01.c b/winsup/testsuite/winsup.api/ltp/execlp01.c
index 383223c07..c3f8b2147 100644
--- a/winsup/testsuite/winsup.api/ltp/execlp01.c
+++ b/winsup/testsuite/winsup.api/ltp/execlp01.c
@@ -171,7 +171,7 @@ main(int ac, char **av)
 	 */
 	switch(pid=fork()) {
 	case 0: 	/* CHILD - Call execlp(2) */
-	    execlp("/usr/bin/test", "/usr/bin/test", 0);
+	    execlp("/usr/bin/test", "/usr/bin/test", NULL);
 	    /* should not get here!! if we do, the parent will fail the Test Case */
 	    exit(errno);	
 	case -1:	/* ERROR!!! exit now!!*/
diff --git a/winsup/testsuite/winsup.api/ltp/fcntl07.c b/winsup/testsuite/winsup.api/ltp/fcntl07.c
index d62eb7967..e0082df45 100644
--- a/winsup/testsuite/winsup.api/ltp/fcntl07.c
+++ b/winsup/testsuite/winsup.api/ltp/fcntl07.c
@@ -375,7 +375,7 @@ do_exec(const char *prog, int fd, const char *tcd)
     case -1:
 	return(-1);
     case 0:				/* child */
-	execlp(prog, openck, "-T", pidname, 0);
+	execlp(prog, openck, "-T", pidname, NULL);
 
 	/* the ONLY reason to do this is to get the errno printed out */
 	fprintf(stderr, "exec(%s, %s, -T, %s) failed.  Errno %s [%d]\n",
diff --git a/winsup/testsuite/winsup.api/ltp/fcntl07B.c b/winsup/testsuite/winsup.api/ltp/fcntl07B.c
index 405bf6127..4e94ff267 100644
--- a/winsup/testsuite/winsup.api/ltp/fcntl07B.c
+++ b/winsup/testsuite/winsup.api/ltp/fcntl07B.c
@@ -374,7 +374,7 @@ do_exec(const char *prog, int fd, const char *tcd)
     case -1:
 	return(-1);
     case 0:				/* child */
-	execlp(prog, openck, "-T", pidname, 0);
+	execlp(prog, openck, "-T", pidname, NULL);
 
 	/* the ONLY reason to do this is to get the errno printed out */
 	fprintf(stderr, "exec(%s, %s, -T, %s) failed.  Errno %s [%d]\n",
diff --git a/winsup/testsuite/winsup.api/signal-into-win32-api.c b/winsup/testsuite/winsup.api/signal-into-win32-api.c
index 26d0cd8e0..57ab8b5c8 100755
--- a/winsup/testsuite/winsup.api/signal-into-win32-api.c
+++ b/winsup/testsuite/winsup.api/signal-into-win32-api.c
@@ -37,7 +37,7 @@ main (int argc, char** argv)
       return 2;
     }
   else if (pid == 0)
-    execl ( argv[0], argv[0], "child", 0 );
+    execl ( argv[0], argv[0], "child", NULL );
   else
     {
       sleep_stage = 0;