diff --git a/include/wolfengine/we_internal.h b/include/wolfengine/we_internal.h
index 24d7201..342c437 100644
--- a/include/wolfengine/we_internal.h
+++ b/include/wolfengine/we_internal.h
@@ -52,7 +52,6 @@
 #endif
 
 #include <openssl/engine.h>
-#include <openssl/aes.h>
 #include <openssl/evp.h>
 #include <openssl/ec.h>
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
@@ -138,6 +137,14 @@ WOLFENGINE_LOCAL void *we_memdup(const void *data, size_t siz);
     #define WE_PRINTF_FUNC(s, v)
 #endif
 
+#ifndef AES_BLOCK_SIZE
+    #ifdef WC_NO_COMPAT_AES_BLOCK_SIZE
+        #define AES_BLOCK_SIZE WC_AES_BLOCK_SIZE
+    #else
+        #error AES_BLOCK_SIZE not defined when it should be
+    #endif
+#endif
+
 /*
  * Global random
  */