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-rw-r--r--tex/context/base/math-fbk.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/tex/context/base/math-fbk.lua b/tex/context/base/math-fbk.lua
index ab3a726d1..564ece8d7 100644
--- a/tex/context/base/math-fbk.lua
+++ b/tex/context/base/math-fbk.lua
@@ -338,7 +338,7 @@ local function accent_to_extensible(target,newchr,original,oldchr,height,depth,s
local addprivate = fonts.helpers.addprivate
if swap then
swap = characters[swap]
- height = swap.depth
+ height = swap.depth or 0
depth = 0
else
height = height or 0