diff --git a/image_analysis/indexing/CUDAMemHelpers.h b/image_analysis/indexing/CUDAMemHelpers.h
index 0aa741556..6d2db7ad0 100644
--- a/image_analysis/indexing/CUDAMemHelpers.h
+++ b/image_analysis/indexing/CUDAMemHelpers.h
@@ -128,6 +128,13 @@ public:
             throw JFJochException(JFJochExceptionCategory::GPUCUDAError,
                                   GPUMemoryFailure("Creating the CUFFT plan (cufftPlanMany)", 0, true,
                                                    ("cuFFT error " + std::to_string(r)).c_str()));
+        // The plan's setup can still be queued on the NULL stream when cufftPlanMany returns, and a
+        // non-blocking stream (CudaStream) does not wait for it: a transform launched on one straight
+        // away read the plan's tables before they were there - an illegal address in 3 of 4 runs where
+        // a rotation pool built its FFT indexers at transform length 3072. Waiting here orders it.
+        if (cudaStreamSynchronize(nullptr) != cudaSuccess)
+            throw JFJochException(JFJochExceptionCategory::GPUCUDAError,
+                                  "Creating the CUFFT plan: setup on the NULL stream failed");
     }
 
     // Convenience overload for vector input