diff --git a/deps/7zip/7zStream.c b/deps/7zip/7zStream.c
index 81c4a0fd23..101a024847 100755
--- a/deps/7zip/7zStream.c
+++ b/deps/7zip/7zStream.c
@@ -7,6 +7,8 @@
 
 #include "Types.h"
 
+SRes SeqInStream_Readuint8_t(ISeqInStream *stream, uint8_t *buf);
+
 SRes SeqInStream_Read2(ISeqInStream *stream, void *buf, size_t size, SRes errorType)
 {
    while (size != 0)