diff --git a/src/libslic3r/Print.cpp b/src/libslic3r/Print.cpp
index 861a4a2d9..049635da2 100644
--- a/src/libslic3r/Print.cpp
+++ b/src/libslic3r/Print.cpp
@@ -29,6 +29,8 @@
 #include <tbb/blocked_range.h>
 #include <tbb/parallel_for.h>
 
+#include "format.hpp"
+
 //BBS: add json support
 #include "nlohmann/json.hpp"
 
@@ -1267,7 +1269,7 @@ StringObjectException Print::validate(StringObjectException *warning, Polygons*
                 }
 
                 StringObjectException except;
-                except.string = format(L("Plate %d: %s does not support filament %s"), this->get_plate_index() + 1, L(bed_type_name), extruder_id + 1);
+                except.string = Slic3r::format(L("Plate %d: %s does not support filament %s"), this->get_plate_index() + 1, L(bed_type_name), extruder_id + 1);
                 except.string += "\n";
                 except.type   = STRING_EXCEPT_FILAMENT_NOT_MATCH_BED_TYPE;
                 except.params.push_back(std::to_string(this->get_plate_index() + 1));
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 9e83a5183..4d7e1b931 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -29,6 +29,8 @@
 
 #include <Shiny/Shiny.h>
 
+#include "format.hpp"
+
 using namespace std::literals;
 
 //! macro used to mark string used at localization,
@@ -474,7 +476,7 @@ void PrintObject::generate_support_material()
                     {SharpTail,L("floating regions")},
                     {Cantilever,L("floating cantilever")},
                     {LargeOverhang,L("large overhangs")} };
-                std::string warning_message = format(L("It seems object %s has %s. Please re-orient the object or enable support generation."),
+                std::string warning_message = Slic3r::format(L("It seems object %s has %s. Please re-orient the object or enable support generation."),
                     this->model_object()->name, reasons[sntype]);
                 this->active_step_add_warning(PrintStateBase::WarningLevel::NON_CRITICAL, warning_message, PrintStateBase::SlicingNeedSupportOn);
             }