diff --git a/libc/bionic/clearenv.c b/libc/bionic/clearenv.c
index ffc58d9..0f6f066 100644
--- a/libc/bionic/clearenv.c
+++ b/libc/bionic/clearenv.c
@@ -26,14 +26,17 @@
  * SUCH DAMAGE.
  */
 
+#include <stddef.h>
+
 extern char** environ;
 
 int clearenv(void)
 {
-	char **P = environ;
-	int offset;
+    char **P = environ;
 
-	for (P = &environ[offset]; *P; ++P)
-		*P = 0;
-        return 0;
+    if (P != NULL) {
+        for (; *P; ++P)
+            *P = NULL;
+    }
+    return 0;
 }
diff --git a/libc/bionic/cpuacct.c b/libc/bionic/cpuacct.c
index abdbc51..7317073 100644
--- a/libc/bionic/cpuacct.c
+++ b/libc/bionic/cpuacct.c
@@ -29,7 +29,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <sys/stat.h>
-//#include <sys/types.h>
+#include "cpuacct.h"
 
 int cpuacct_add(uid_t uid)
 {
diff --git a/libc/bionic/fork.c b/libc/bionic/fork.c
index e20f548..79b8fff 100644
--- a/libc/bionic/fork.c
+++ b/libc/bionic/fork.c
@@ -27,6 +27,7 @@
  */
 #include <unistd.h>
 #include "pthread_internal.h"
+#include "cpuacct.h"
 
 extern int  __fork(void);
 
diff --git a/libc/bionic/fts.c b/libc/bionic/fts.c
index 3dcfb28..c7770b6 100644
--- a/libc/bionic/fts.c
+++ b/libc/bionic/fts.c
@@ -548,9 +548,9 @@
 	DIR *dirp;
 	void *oldaddr;
 	size_t len, maxlen;
-	int nitems, cderrno, descend, level, nlinks, nostat, doadjust;
+	int nitems, cderrno, descend, level, nlinks, nostat = 0, doadjust;
 	int saved_errno;
-	char *cp;
+	char *cp = NULL;
 
 	/* Set current node pointer. */
 	cur = sp->fts_cur;
diff --git a/libc/bionic/pthread.c b/libc/bionic/pthread.c
index 8eee136..061cce1 100644
--- a/libc/bionic/pthread.c
+++ b/libc/bionic/pthread.c
@@ -48,6 +48,7 @@
 #include <sys/prctl.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <stdio.h>
 
 extern int  __pthread_clone(int (*fn)(void*), void *child_stack, int flags, void *arg);
 extern void _exit_with_stack_teardown(void * stackBase, int stackSize, int retCode);
diff --git a/libc/bionic/system_properties.c b/libc/bionic/system_properties.c
index 5e3b9e7..767baa3 100644
--- a/libc/bionic/system_properties.c
+++ b/libc/bionic/system_properties.c
@@ -126,7 +126,7 @@
     for(;;) {
         serial = pi->serial;
         while(SERIAL_DIRTY(serial)) {
-            __futex_wait(&pi->serial, serial, 0);
+            __futex_wait((volatile void *)&pi->serial, serial, 0);
             serial = pi->serial;
         }
         len = SERIAL_VALUE_LEN(serial);
@@ -164,7 +164,7 @@
     } else {
         n = pi->serial;
         do {
-            __futex_wait(&pi->serial, n, 0);
+            __futex_wait((volatile void *)&pi->serial, n, 0);
         } while(n == pi->serial);
     }
     return 0;