diff --git a/src/utilities/ticks/fortplot_tick_formatting.f90 b/src/utilities/ticks/fortplot_tick_formatting.f90
index 73513b77..33301c72 100644
--- a/src/utilities/ticks/fortplot_tick_formatting.f90
+++ b/src/utilities/ticks/fortplot_tick_formatting.f90
@@ -26,7 +26,7 @@ function format_tick_value(value, range) result(formatted)
         
         abs_value = abs(value)
         
-        if (abs_value < 1.0e-10_wp) then
+        if (abs_value <= epsilon(1.0_wp)) then
             formatted = '0'
         else if (range >= 100.0_wp .or. abs_value >= SCIENTIFIC_THRESHOLD_HIGH) then
             ! Use integer format for large ranges
@@ -60,7 +60,7 @@ function format_tick_value_smart(value, max_chars) result(formatted)
         abs_value = abs(value)
         
         ! Handle zero
-        if (abs_value < 1.0e-10_wp) then
+        if (abs_value <= epsilon(1.0_wp)) then
             formatted = '0'
             return
         end if