diff --git a/src/libslic3r/Fill/Fill.cpp b/src/libslic3r/Fill/Fill.cpp
index addea9b9e1..d206d41c13 100644
--- a/src/libslic3r/Fill/Fill.cpp
+++ b/src/libslic3r/Fill/Fill.cpp
@@ -608,7 +608,7 @@ void Layer::make_ironing()
 				ironing_params.line_spacing = config.ironing_spacing;
 				ironing_params.height 		= default_layer_height * 0.01 * config.ironing_flow;
 				ironing_params.speed 		= config.ironing_speed;
-				ironing_params.angle 		= config.ironing_direction * M_PI / 180.;
+				ironing_params.angle 		= (int(config.ironing_direction.value+layerm->region().config().infill_direction.value)%180) * M_PI / 180.;
 				ironing_params.pattern      = config.ironing_pattern;
 				ironing_params.layerm 		= layerm;
 				by_extruder.emplace_back(ironing_params);
@@ -701,7 +701,7 @@ void Layer::make_ironing()
 
         // Create the filler object.
         f->spacing = ironing_params.line_spacing;
-        f->angle = float(ironing_params.angle + 0.25 * M_PI);
+        f->angle = float(ironing_params.angle);
         f->link_max_length = (coord_t) scale_(3. * f->spacing);
 		double  extrusion_height = ironing_params.height * f->spacing / nozzle_dmr;
 		float  extrusion_width  = Flow::rounded_rectangle_extrusion_width_from_spacing(float(nozzle_dmr), float(extrusion_height));
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 9f01bd7f52..77f46a4819 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -1932,7 +1932,7 @@ void PrintConfigDef::init_fff_params()
     def           = this->add("ironing_direction", coFloat);
     def->label    = L("ironing direction");
     def->category = L("Quality");
-    def->tooltip  = L("Angle for ironing, which controls the angle of the nozzle when ironing");
+    def->tooltip  = L("Angle for ironing, which controls the relative angle between the top surface and ironing");
     def->sidetext = L("°");
     def->min      = 0;
     def->max      = 360;