diff --git a/Project.toml b/Project.toml
index 921dc054d..e17343312 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "DynamicPPL"
 uuid = "366bfd00-2699-11ea-058f-f148b4cae6d8"
-version = "0.12.1"
+version = "0.12.2"
 
 [deps]
 AbstractMCMC = "80f14c24-f653-4e6a-9b94-39d6b0f70001"
diff --git a/src/varinfo.jl b/src/varinfo.jl
index fe3262dd5..a226506f4 100644
--- a/src/varinfo.jl
+++ b/src/varinfo.jl
@@ -499,8 +499,13 @@ end
     length(exprs) == 0 && return :(NamedTuple())
     return :($(exprs...),)
 end
+
 @inline function findranges(f_ranges, f_idcs)
-    return mapreduce(i -> f_ranges[i], vcat, f_idcs; init=Int[])
+    results = Int[]
+    for i in f_idcs
+        append!(results, f_ranges[i])
+    end
+    return results
 end
 
 """