diff --git a/src/types/unitframe.lua b/src/types/unitframe.lua
index 6f10b8f..37d6b1f 100644
--- a/src/types/unitframe.lua
+++ b/src/types/unitframe.lua
@@ -201,9 +201,9 @@ function UnitFrame:IsInRange()
 
     -- Prefer to use configured spells
     if friendlySpell and UnitCanAssist("player", unit) then
-        return IsSpellInRange(friendlySpell, unit) == 1
+        return C_Spell.IsSpellInRange(friendlySpell, unit) == true
     elseif enemySpell and UnitCanAttack("player", unit) then
-        return IsSpellInRange(enemySpell, unit) == 1
+        return C_Spell.IsSpellInRange(enemySpell, unit) == true
     end
 
     -- Fall back to raid/party only range check