diff --git a/crypto/apr_crypto_openssl.c b/crypto/apr_crypto_openssl.c
index 34d0559..4069cf9 100644
--- a/crypto/apr_crypto_openssl.c
+++ b/crypto/apr_crypto_openssl.c
@@ -37,7 +37,6 @@
 
 #include <openssl/evp.h>
 #include <openssl/rand.h>
-#include <openssl/engine.h>
 #include <openssl/opensslv.h>
 #if OPENSSL_VERSION_NUMBER >= 0x30000000
 #include <openssl/macros.h>
@@ -92,6 +91,10 @@
 #define APR_USE_OPENSSL_ENGINE_API 0
 #endif
 
+#if APR_USE_OPENSSL_ENGINE_API
+#include <openssl/engine.h>
+#endif
+
 #define LOG_PREFIX "apr_crypto_openssl: "
 
 struct apr_crypto_t {