diff --git a/Changes b/Changes
index 38882d6..a69f8fa 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,7 @@
 Revision history for Perl extension Crypt::OpenSSL::RSA.
 
+    - Fix old openssl on strawberry does not include whrlpool.h
+
 0.35 May 7 2025
     - Disable PKCS#1 v1.5 padding. It's not practical to mitigate marvin attacks so we will instead disable this and require alternatives to address the issue.
       - Resolves #42 - CVE-2024-2467.
diff --git a/RSA.xs b/RSA.xs
index 775ae3e..066ee00 100644
--- a/RSA.xs
+++ b/RSA.xs
@@ -10,7 +10,7 @@
 #include <openssl/pem.h>
 #include <openssl/rand.h>
 #include <openssl/ripemd.h>
-#if OPENSSL_VERSION_NUMBER < 0x30000000
+#if OPENSSL_VERSION_NUMBER >= 0x10000000 & OPENSSL_VERSION_NUMBER < 0x30000000
 #include <openssl/whrlpool.h>
 #endif
 #include <openssl/rsa.h>