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-rw-r--r--filters/karbon/ai/ailexer.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/filters/karbon/ai/ailexer.cc b/filters/karbon/ai/ailexer.cc
index 935403d9..352b8f48 100644
--- a/filters/karbon/ai/ailexer.cc
+++ b/filters/karbon/ai/ailexer.cc
@@ -73,7 +73,7 @@ const char*statetoa (State state){
typedef struct {
State oldState;
- char c;
+ signed char c;
State newState;
Action action;
} Transition;