diff --git a/wolfssl/wolfcrypt/wc_lms.h b/wolfssl/wolfcrypt/wc_lms.h
index 8726a7b4cb..18a13c8697 100644
--- a/wolfssl/wolfcrypt/wc_lms.h
+++ b/wolfssl/wolfcrypt/wc_lms.h
@@ -95,6 +95,12 @@
 #include <wolfssl/wolfcrypt/lms.h>
 #include <wolfssl/wolfcrypt/sha256.h>
 
+/* When hash struct internals are not accessible (hardware SHA acceleration),
+ * fall back to full hash API calls. */
+#if defined(WOLFSSL_NO_HASH_RAW) && !defined(WC_LMS_FULL_HASH)
+    #define WC_LMS_FULL_HASH
+#endif
+
 #ifdef WOLFSSL_LMS_MAX_LEVELS
     /* Maximum number of levels of trees supported by implementation. */
     #define LMS_MAX_LEVELS          WOLFSSL_LMS_MAX_LEVELS
diff --git a/wolfssl/wolfcrypt/wc_xmss.h b/wolfssl/wolfcrypt/wc_xmss.h
index db7ba44167..c9b4265805 100644
--- a/wolfssl/wolfcrypt/wc_xmss.h
+++ b/wolfssl/wolfcrypt/wc_xmss.h
@@ -34,6 +34,12 @@
 #include <wolfssl/wolfcrypt/sha512.h>
 #include <wolfssl/wolfcrypt/sha3.h>
 
+/* When hash struct internals are not accessible (hardware SHA acceleration),
+ * fall back to full hash API calls. */
+#if defined(WOLFSSL_NO_HASH_RAW) && !defined(WC_XMSS_FULL_HASH)
+    #define WC_XMSS_FULL_HASH
+#endif
+
 #if !defined(WOLFSSL_WC_XMSS)
     #error "This code is incompatible with external implementation of XMSS."
 #endif