diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 69c2be255..5311aad01 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -710,7 +710,7 @@ void PrintConfigDef::init_fff_params()
     def->cli = "top-fill-pattern|external-fill-pattern=s";
     def->enum_keys_map = &ConfigOptionEnum<InfillPattern>::get_enum_values();
     def->enum_values.push_back("rectilinear");
-    def->enum_values.push_back("monotonicgapfillgapfill");
+    def->enum_values.push_back("monotonicgapfill");
     def->enum_values.push_back("monotonic");
     def->enum_values.push_back("concentric");
     def->enum_values.push_back("concentricgapfill");