diff --git a/configure.ac b/configure.ac
index b51ab4d47d..9553ad5902 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2271,7 +2271,7 @@ fi
         exit 1
     ])
 
-    AS_IF([test "x$enable_dpi" = "xyes"], [
+    AS_IF([test "x$enable_ndpi" = "xyes"], [
         if test "x$enable_shared" = "xno"; then
             echo
             echo "   ERROR! ndpi cannot be enabled with --disable-shared"