diff --git a/jwst/refpix/optimized_convolution.py b/jwst/refpix/optimized_convolution.py
index 46abd3e733..02872114b7 100644
--- a/jwst/refpix/optimized_convolution.py
+++ b/jwst/refpix/optimized_convolution.py
@@ -12,7 +12,7 @@
 
 def make_kernels(sirs_kernel_model, detector, gaussmooth, halfwidth):
     """
-    Make convolution kernels reference file's Fourier coefficients.
+    Make convolution kernels from Fourier coefficients in the reference file.
 
     Parameters:
     -----------