diff --git a/headers/posix/string.h b/headers/posix/string.h
index b5b918f9c7..bc1b61f5ac 100644
--- a/headers/posix/string.h
+++ b/headers/posix/string.h
@@ -75,7 +75,7 @@ extern const char	*strsignal(int signal);
 
 /* legacy compatibility -- might be removed one day */
 #define bcmp(a, b, length) memcmp((a), (b), (length))
-#define bcopy(source, dest, length) memcpy((dest), (source), (length))
+#define bcopy(source, dest, length) memmove((dest), (source), (length))
 #define bzero(buffer, length) memset((buffer), 0, (length))
 
 extern int ffs(int i);
diff --git a/src/system/libroot/posix/string/bcopy.c b/src/system/libroot/posix/string/bcopy.c
index 589e88bd36..ff5e4367a7 100644
--- a/src/system/libroot/posix/string/bcopy.c
+++ b/src/system/libroot/posix/string/bcopy.c
@@ -16,6 +16,6 @@ void *bcopy(void const *src, void *dest, size_t count);
 void *
 bcopy(void const *src, void *dest, size_t count)
 {
-	return memcpy(dest, src, count);
+	return memmove(dest, src, count);
 }