diff --git a/common/lz4/lz4.c b/common/lz4/lz4.c
index 7c7ec93bd..9de0c00db 100644
--- a/common/lz4/lz4.c
+++ b/common/lz4/lz4.c
@@ -1270,6 +1270,7 @@ int LZ4_compress_default(const char* src, char* dst, int srcSize, int maxOutputS
 }
 
 
+int LZ4_compress_fast_force(const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
 /* hidden debug function */
 /* strangely enough, gcc generates faster code when this function is uncommented, even if unused */
 int LZ4_compress_fast_force(const char* src, char* dst, int srcSize, int dstCapacity, int acceleration)
@@ -1644,6 +1645,9 @@ read_variable_length(const BYTE**ip, const BYTE* lencheck, int loop_check, int i
   return length;
 }
 
+int LZ4_decompress_generic(const char* const src, char* const dst, int srcSize, int outputSize, endCondition_directive endOnInput, earlyEnd_directive partialDecoding,
+                 dict_directive dict, const BYTE* const lowPrefix, const BYTE* const dictStart, const size_t dictSize );
+
 /*! LZ4_decompress_generic() :
  *  This generic decompression function covers all use cases.
  *  It shall be instantiated several times, using different sets of directives.