diff --git a/configure.ac b/configure.ac
index 49646ad9..cc5add7f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -59,12 +59,15 @@ CFLAGS="$KVZ_CFLAGS $CFLAGS"
 AC_ARG_WITH([cryptopp],
     AS_HELP_STRING([--with-cryptopp],
         [Build with cryptopp Enables selective encryption.]))
-AS_IF([test "x$with_cryptopp" = "xyes"], [
-    PKG_CHECK_MODULES([cryptopp], [cryptopp],
+AS_IF([test "x$with_cryptopp" = "xyes"],
+    [PKG_CHECK_MODULES([cryptopp], [cryptopp],
         [AC_DEFINE([KVZ_SEL_ENCRYPTION], [1], [With cryptopp])],
-        [AC_MSG_ERROR([cryptopp not found with pkg-config])]
-    )
-])
+        [PKG_CHECK_MODULES([cryptopp], [libcrypto++],
+            [AC_DEFINE([KVZ_SEL_ENCRYPTION], [1], [With cryptopp])],
+            [AC_MSG_ERROR([neither cryptopp nor libcrypto++ found with pkg-config])]
+        )]
+    )]
+)
 
 AM_CONDITIONAL([USE_CRYPTOPP], [test "x$with_cryptopp" = "xyes"])
 CPPFLAGS="$CPPFLAGS $cryptopp_CFLAGS"