diff --git a/pkgs/tools/networking/curl/default.nix b/pkgs/tools/networking/curl/default.nix
index 5dba94abe35b..aee0668c7f2d 100644
--- a/pkgs/tools/networking/curl/default.nix
+++ b/pkgs/tools/networking/curl/default.nix
@@ -96,7 +96,7 @@ stdenv.mkDerivation rec {
       "--without-ca-bundle"
       "--without-ca-path"
       # The build fails when using wolfssl with --with-ca-fallback
-      (lib.withFeature wolfsslSupport "ca-fallback")
+      (lib.withFeature (!wolfsslSupport) "ca-fallback")
       "--disable-manual"
       (lib.withFeatureAs sslSupport "ssl" openssl.dev)
       (lib.withFeatureAs gnutlsSupport "gnutls" gnutls.dev)