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-rw-r--r--src/termkey/driver-csi.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/termkey/driver-csi.c b/src/termkey/driver-csi.c
index 37b14986d0..f179e3c9fa 100644
--- a/src/termkey/driver-csi.c
+++ b/src/termkey/driver-csi.c
@@ -322,7 +322,7 @@ TermKeyResult termkey_interpret_modereport(TermKey *tk, const TermKeyKey *key, i
*initial = key->code.mouse[0];
if(mode)
- *mode = (key->code.mouse[1] << 8) | key->code.mouse[2];
+ *mode = ((uint8_t)key->code.mouse[1] << 8) | (uint8_t)key->code.mouse[2];
if(value)
*value = key->code.mouse[3];