diff --git a/src/misc/digest.h b/src/misc/digest.h
index 150e282..e6b60c8 100644
--- a/src/misc/digest.h
+++ b/src/misc/digest.h
@@ -3,6 +3,7 @@
 #include <string>
 #include <string_view>
 #include <cstring>
+#include <cassert>
 
 #ifdef NO_OPEN_SSL
 #define SHA_DIGEST_LENGTH (20)