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-rw-r--r--src/index.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/index.cpp b/src/index.cpp
index 70143f0..1d3a7d1 100644
--- a/src/index.cpp
+++ b/src/index.cpp
@@ -1203,7 +1203,7 @@ void writeAlphabeticalClassList(OutputList &ol)
if (cd->isLinkableInProject() && cd->templateMaster()==0)
{
int index = getPrefixIndex(cd->className());
- startLetter=toupper(cd->className().at(index));
+ startLetter=toupper(cd->className().at(index))&0xFF;
// Do some sorting again, since the classes are sorted by name with
// prefix, which should be ignored really.
classesByLetter[startLetter].inSort (cd);