diff --git a/example/complex_transforms.f90 b/example/complex_transforms.f90
index f1ff0f5..feffcf0 100644
--- a/example/complex_transforms.f90
+++ b/example/complex_transforms.f90
@@ -33,7 +33,7 @@ program complex_transforms
   print complex_format, "fft_f = ", fft_f
   print complex_format, "f_round_trip = ",f_round_trip
 
-  !call assert(all(abs(f_round_trip - f) < tolerance), "inverse of forward FFT must yield the original function")
+  call assert(all(abs(f_round_trip - f) < tolerance), "inverse of forward FFT must yield the original function")
 
 contains