diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 44c0f2a5a..1cdc9eef6 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -508,6 +508,9 @@ static std::vector<Vec2d> get_path_of_change_filament(const Print& print)
                 config.set_key_value("flush_length", new ConfigOptionFloat(purge_length));
 
                 int flush_count = std::min(g_max_flush_count, (int)std::round(purge_volume / g_purge_volume_one_time));
+                // handle cases for very small purge
+                if (flush_count == 0 && purge_volume > 0)
+                    flush_count += 1;
                 float flush_unit = purge_length / flush_count;
                 int flush_idx = 0;
                 for (; flush_idx < flush_count; flush_idx++) {
@@ -5570,6 +5573,9 @@ std::string GCode::set_extruder(unsigned int extruder_id, double print_z, bool b
     dyn_config.set_key_value("flush_length", new ConfigOptionFloat(wipe_length));
 
     int flush_count = std::min(g_max_flush_count, (int)std::round(wipe_volume / g_purge_volume_one_time));
+    // handle cases for very small purge
+    if (flush_count == 0 && wipe_volume > 0)
+        flush_count += 1;
     float flush_unit = wipe_length / flush_count;
     int flush_idx = 0;
     for (; flush_idx < flush_count; flush_idx++) {