diff --git a/src/libstrongswan/plugins/ctr/ctr_ipsec_crypter.h b/src/libstrongswan/plugins/ctr/ctr_ipsec_crypter.h
index e9421a1be..3814465e4 100644
--- a/src/libstrongswan/plugins/ctr/ctr_ipsec_crypter.h
+++ b/src/libstrongswan/plugins/ctr/ctr_ipsec_crypter.h
@@ -37,11 +37,6 @@ struct ctr_ipsec_crypter_t {
 	crypter_t crypter;
 };
 
-/**
- * Create a ctr_ipsec_crypter instance.
- */
-ctr_ipsec_crypter_t *ctr_ipsec_crypter_create();
-
 /**
  * Create a ctr_ipsec_crypter instance.
  *