diff --git a/all-io.h b/all-io.h
index d8a3e6d..6a9d9e0 100644
--- a/all-io.h
+++ b/all-io.h
@@ -9,6 +9,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
+#include <time.h>
 
 #include "c.h"
 
@@ -29,8 +30,11 @@ static inline int write_all(int fd, const void *buf, size_t count)
 				buf = (void *) ((char *) buf + tmp);
 		} else if (errno != EINTR && errno != EAGAIN)
 			return -1;
-		if (errno == EAGAIN)	/* Try later, *sigh* */
-			usleep(10000);
+		if (errno == EAGAIN) {	/* Try later, *sigh* */
+			struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
+
+			nanosleep(&ts, NULL);
+		}
 	}
 	return 0;
 }
@@ -46,8 +50,11 @@ static inline int fwrite_all(const void *ptr, size_t size,
 				ptr = (void *) ((char *) ptr + (tmp * size));
 		} else if (errno != EINTR && errno != EAGAIN)
 			return -1;
-		if (errno == EAGAIN)	/* Try later, *sigh* */
-			usleep(10000);
+		if (errno == EAGAIN) {	/* Try later, *sigh* */
+			struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
+
+			nanosleep(&ts, NULL);
+		}
 	}
 	return 0;
 }