diff --git a/fp.h b/fp.h
index 4e42338..2d243b7 100644
--- a/fp.h
+++ b/fp.h
@@ -34,6 +34,9 @@ extern "C" {
 unsigned char *fppenc64(   uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
 unsigned char *fppdec64(   unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
 
+unsigned char *fppdec64(unsigned char *in, unsigned n, uint64_t *out, uint64_t start);
+unsigned char *fpddenc64(uint64_t *in, unsigned n, unsigned char *out, uint64_t start);
+
 //---- FCM: Finite Context Method Predictor 
 unsigned char *fpfcmenc64( uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
 unsigned char *fpfcmdec64( unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
@@ -41,7 +44,6 @@ unsigned char *fpfcmdec64( unsigned char *in, unsigned n, uint64_t      *out, ui
 // DFCM: Differential Finite Context Method Predictor 
 unsigned char *fpdfcmenc64(uint64_t      *in, unsigned n, unsigned char *out, uint64_t start);
 unsigned char *fpdfcmdec64(unsigned char *in, unsigned n, uint64_t      *out, uint64_t start);
-
 #ifdef __cplusplus
 }
 #endif