diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index d50985bb7..7099c9aeb 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -1258,7 +1258,7 @@ void PrintConfigDef::init_fff_params()
     def->set_default_value(new ConfigOptionFloats{ 1.75 });
 
     def = this->add("filament_shrink", coPercents);
-    def->label = L("Shrikage");
+    def->label = L("Shrinkage");
     def->tooltip = L("Enter the shrinkage percentage that the filament will get after cooling (94% if you measure 94mm instead of 100mm)."
                     " The part will be scaled in xy to conpensate."
                     " Only the filament used for the perimeter is taken into account."
diff --git a/src/libslic3r/Slicing.cpp b/src/libslic3r/Slicing.cpp
index f45984bd5..82eafcf3b 100644
--- a/src/libslic3r/Slicing.cpp
+++ b/src/libslic3r/Slicing.cpp
@@ -32,7 +32,7 @@ coordf_t check_z_step(const coordf_t val, const coordf_t z_step) {
     //return int((val + z_step * 0.5) / z_step) * z_step;
 }
 inline bool test_z_step(const coordf_t val, const coordf_t z_step) {
-    if (z_step <= EPSILON) return val;
+    if (z_step <= EPSILON) return true;
     uint64_t valint = uint64_t(val * 100000000. + 0.1);
     uint64_t stepint = uint64_t(z_step * 100000000. + 0.1);
     return valint % stepint == 0;