diff --git a/src/libslic3r/GCode/CoolingBuffer.cpp b/src/libslic3r/GCode/CoolingBuffer.cpp
index 1d1a60c87..ba05e0c00 100644
--- a/src/libslic3r/GCode/CoolingBuffer.cpp
+++ b/src/libslic3r/GCode/CoolingBuffer.cpp
@@ -518,7 +518,7 @@ static inline void extruder_range_slow_down_non_proportional(
     for (PerExtruderAdjustments *adj : by_min_print_speed) {
         adj->idx_line_begin = 0;
         adj->idx_line_end   = 0;
-        assert(adj->idx_line_begin < adj->n_lines_adjustable);
+//        assert(adj->idx_line_begin < adj->n_lines_adjustable); //w8 for prusa to correct the root cause
         if (adj->lines[adj->idx_line_begin].feedrate > feedrate)
             feedrate = adj->lines[adj->idx_line_begin].feedrate;
     }