diff --git a/crypto/fipsmodule/cipher/aead.c b/crypto/fipsmodule/cipher/aead.c
index d92b4fb3..a44889f9 100644
--- a/crypto/fipsmodule/cipher/aead.c
+++ b/crypto/fipsmodule/cipher/aead.c
@@ -14,6 +14,7 @@
 
 #include <openssl/aead.h>
 
+#include <assert.h>
 #include <string.h>
 
 #include <openssl/cipher.h>