diff --git a/src/main.cpp b/src/main.cpp
index c00a189c7..3f95abb57 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1710,7 +1710,7 @@ int main(int argc, const char * argv[]) {
 					SHA1(fb, statbuf.st_size, temp);
 					binary_sha1 = (char *)malloc(SHA_DIGEST_LENGTH*2+1);
 					memset(binary_sha1, 0, SHA_DIGEST_LENGTH*2+1);
-					char buf[SHA_DIGEST_LENGTH*2];
+					char buf[SHA_DIGEST_LENGTH*2 + 1];
 					for (int i=0; i < SHA_DIGEST_LENGTH; i++) {
 						sprintf((char*)&(buf[i*2]), "%02x", temp[i]);
 					}