diff --git a/src/Schedulers/DDPM.jl b/src/Schedulers/DDPM.jl
index 2b3f870..902462e 100644
--- a/src/Schedulers/DDPM.jl
+++ b/src/Schedulers/DDPM.jl
@@ -179,18 +179,18 @@ function get_variance(
   if variance_type == FIXED_SMALL
     # arxiv:2006.11239 Eq. 6
     # arxiv:2208.11970 Eq. 70
-    σₜ = β̅ₜ₋₁ ./ β̅ₜ .* βₜ
+    σ²ₜ = β̅ₜ₋₁ ./ β̅ₜ .* βₜ
   elseif variance_type == FIXED_SMALL_LOG
-    σₜ = β̅ₜ₋₁ ./ β̅ₜ .* βₜ
-    σₜ = log.(σₜ)
+    σ²ₜ = β̅ₜ₋₁ ./ β̅ₜ .* βₜ
+    σ²ₜ = log.(σ²ₜ)
   elseif variance_type == FIXED_LARGE
-    σₜ = βₜ
+    σ²ₜ = βₜ
   elseif variance_type == FIXED_LARGE_LOG
-    σₜ = βₜ
-    σₜ = log.(σₜ)
+    σ²ₜ = βₜ
+    σ²ₜ = log.(σ²ₜ)
   else
     throw("unimplemented variance type")
   end
 
-  return σₜ
+  return σ²ₜ
 end