diff --git a/load_cd_events.m b/load_cd_events.m
index e8f4145..532ef01 100644
--- a/load_cd_events.m
+++ b/load_cd_events.m
@@ -4,7 +4,7 @@
 % Loads data from files generated by the StreamLogger consumer for any type
 % of event. This function only read (t,x,y,p) and discard other fields (if
 % any) of events.
-% timestamps are in uS
+% timestamps are in us
 % cd_data is a structure containing the fields ts, x, y and p
 %
 % flipX, flipY allow to flip the image around the X and Y axes. If these values
@@ -50,9 +50,9 @@
 evSize = 8;
 if (numCommentLine>0) % Ensure compatibility with previous files.
     % Read event type
-    evType = fread(f,1,'char');
+    evType = fread(f,1,'uint8=>char');
     % Read event size
-    evSize = fread(f,1,'char');
+    evSize = fread(f,1,'uint8=>char');
 end
 
 
diff --git a/load_ext_trigger_data.m b/load_ext_trigger_data.m
index f5b8e22..17da727 100644
--- a/load_ext_trigger_data.m
+++ b/load_ext_trigger_data.m
@@ -3,7 +3,7 @@
 %
 % Loads data from files generated by the StreamLogger consumer for EventExtTrigger
 % events [ts,x,y,p,id].
-% timestamps are in uS
+% timestamps are in us
 % ext_trigger is a structure containing the fields ts, x, y, p and id
 
 f=fopen(filename);
@@ -37,9 +37,9 @@
 evSize = 8;
 if (numCommentLine>0) % Ensure compatibility with previous files.
     % Read event type
-    evType = fread(f,1,'char');
+    evType = fread(f,1,'uint8=>char');
     % Read event size
-    evSize = fread(f,1,'char');
+    evSize = fread(f,1,'uint8=>char');
 end