diff --git a/impl_chacha20.h b/impl_chacha20.h
index a207db1..16ecbeb 100644
--- a/impl_chacha20.h
+++ b/impl_chacha20.h
@@ -14,9 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <stddef.h>
-#include <stdint.h>
-
 #include "lilcrypto.h"
 
 
diff --git a/impl_hmac.h b/impl_hmac.h
index cded119..a8d74db 100644
--- a/impl_hmac.h
+++ b/impl_hmac.h
@@ -14,9 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <stddef.h>
-#include <stdint.h>
-
 #include "lilcrypto.h"
 
 
diff --git a/impl_poly1305.h b/impl_poly1305.h
index 6d2f7ce..6073ef6 100644
--- a/impl_poly1305.h
+++ b/impl_poly1305.h
@@ -14,9 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <stddef.h>
-#include <stdint.h>
-
 #include "lilcrypto.h"
 
 
diff --git a/impl_sha256.h b/impl_sha256.h
index c86d096..84c1cd3 100644
--- a/impl_sha256.h
+++ b/impl_sha256.h
@@ -14,9 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <stddef.h>
-#include <stdint.h>
-
 #include "lilcrypto.h"
 
 
diff --git a/impl_sha512.h b/impl_sha512.h
index abac4e5..be197aa 100644
--- a/impl_sha512.h
+++ b/impl_sha512.h
@@ -14,9 +14,6 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <stddef.h>
-#include <stdint.h>
-
 #include "lilcrypto.h"