diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6d5cc47c..d53e8db88 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,10 +5,11 @@
 
 # News
 
-## v0.9.4 - 2024-06-14
+## v0.9.4 - 2024-06-19
 
 - Addition of a constructor for concatenated quantum codes -- `Concat`.
 - Addition of multiple unexported classical code constructors.
+- Failed compactification of gates now only raises a warning instead of throwing an error. Defaults to slower non-compactified gates.
 - Gate errors are now conveniently supported by the various ECC benchmark setups in the `ECC` module.
 - Remove printing of spurious debug info from the PyBP decoder. 
 - Significant improvements to the low-level circuit compiler (the sumtype compactifier), leading to faster Pauli frame simulation of noisy circuits.
diff --git a/Project.toml b/Project.toml
index 15c21efa5..efbf60078 100644
--- a/Project.toml
+++ b/Project.toml
@@ -56,7 +56,7 @@ Makie = "0.20, 0.21"
 Nemo = "0.42, 0.43, 0.44, 0.45"
 Plots = "1.38.0"
 PrecompileTools = "1.2"
-PyQDecoders = "0.2.0"
+PyQDecoders = "0.2.1"
 Quantikz = "1.3.1"
 QuantumInterface = "0.3.3"
 QuantumOpticsBase = "0.4.18"
diff --git a/src/pauli_frames.jl b/src/pauli_frames.jl
index 0fde80f1c..2a4504c8a 100644
--- a/src/pauli_frames.jl
+++ b/src/pauli_frames.jl
@@ -175,7 +175,12 @@ function _pftrajectories(circuit;trajectories=5000,threads=true)
     ccircuit = if eltype(circuit) <: CompactifiedGate
         circuit
     else
-        compactify_circuit(circuit)
+        try
+            compactify_circuit(circuit)
+        catch err
+            @warn "Could not compactify the circuit, falling back to a slower version of the simulation. Consider reporting this issue to the package maintainers to improve performance. The offending gate was `$(err.args[2])`."
+            circuit
+        end
     end
     frames = _create_pauliframe(ccircuit; trajectories)
     nthr = min(Threads.nthreads(),trajectories÷(100))
diff --git a/test/runtests.jl b/test/runtests.jl
index 1177d673f..f274479a4 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -69,6 +69,7 @@ end
 @doset "ecc_throws"
 @doset "precompile"
 @doset "pauliframe"
+@doset "sumtypecompactification"
 @doset "allocations"
 VERSION >= v"1.10" && @doset "doctests"
 get(ENV,"JET_TEST","")=="true" && @doset "jet"
diff --git a/test/test_sumtypecompactification.jl b/test/test_sumtypecompactification.jl
new file mode 100644
index 000000000..11c902d4e
--- /dev/null
+++ b/test/test_sumtypecompactification.jl
@@ -0,0 +1,7 @@
+using Test
+using QuantumClifford
+
+@testset "SumTypes compactification" begin
+    @test_warn "Could not compactify the circuit" QuantumClifford.pftrajectories([ClassicalXOR{17}((65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81), 282)])
+    QuantumClifford.compactify_circuit([ClassicalXOR{3}((65, 66, 67), 282)])
+end