diff --git a/hyperde3.mod b/hyperde3.mod
index dc0e40d..ca061da 100644
--- a/hyperde3.mod
+++ b/hyperde3.mod
@@ -99,11 +99,11 @@ INITIAL {
 	trates(v)
 	
 	hyf = hyfinf
-      hys = hysinf
+	hys = hysinf
 	hyhtf = hyhtfinf
 	hyhts = hyhtsinf
 	VERBATIM
-	return 0;
+	return;
 	ENDVERBATIM
 }
 
diff --git a/ichan2.mod b/ichan2.mod
index 4d79f53..03a4dfe 100644
--- a/ichan2.mod
+++ b/ichan2.mod
@@ -87,11 +87,11 @@ INITIAL {
 	
 	m = minf
 	h = hinf
-      nf = nfinf
-      ns = nsinf
+	nf = nfinf
+	ns = nsinf
 	
 	VERBATIM
-	return 0;
+	return;
 	ENDVERBATIM
 }
 
diff --git a/readme.html b/readme.html
index fffec0d..4d8d124 100644
--- a/readme.html
+++ b/readme.html
@@ -61,6 +61,11 @@
 1 GHz Linux Pentium).  Note: a processor time seeded random number
 generator makes every run different (for statistical analysis).
 
+
+Changelog
+---------
+2022-05: Updated MOD files to contain valid C++ and be compatible with
+         the upcoming versions 8.2 and 9.0 of NEURON.
 </pre>
 
 </html>