diff --git a/matlab/loadjson_.m b/matlab/loadjson_.m
index 2767c50a7..7daeffd49 100644
--- a/matlab/loadjson_.m
+++ b/matlab/loadjson_.m
@@ -36,5 +36,11 @@ if isoctave() || matlab_ver_less_than('9.1')
 end
 
 json = fileread(jsonfilename);
+
+% Remove some escape characters that cannot be interpreted by jsondecode
+json = strrep(json, '\w', '\\w');
+json = strrep(json, '\_', '\\_');
+json = strrep(json, '\\\_', '\\_');
+
 o = jsondecode(json); clear('json');
 o = convertjsondecode(o);
\ No newline at end of file
diff --git a/preprocessor b/preprocessor
index 985d74238..88830aa0e 160000
--- a/preprocessor
+++ b/preprocessor
@@ -1 +1 @@
-Subproject commit 985d74238170a06509c7239ba1df48b0d645ff6f
+Subproject commit 88830aa0e64e2161eb7cfceb294e487b6935a76c