--- plugins/qca-ossl/CMakeLists.txt.orig
+++ plugins/qca-ossl/CMakeLists.txt
@@ -32,7 +32,7 @@
     message(WARNING "qca-ossl will be compiled without SHA-0 digest algorithm support")
   endif(HAVE_OPENSSL_SHA0)
 
-  set(QCA_OSSL_SOURCES qca-ossl.cpp)
+  set(QCA_OSSL_SOURCES qca-ossl.cpp libcrypto-compat.c)
 
   my_automoc( QCA_OSSL_SOURCES )