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-rw-r--r--source/fitz/harfbuzz.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/source/fitz/harfbuzz.c b/source/fitz/harfbuzz.c
index 319e2b65..d2ff3bf5 100644
--- a/source/fitz/harfbuzz.c
+++ b/source/fitz/harfbuzz.c
@@ -7,6 +7,8 @@
#include "hb.h"
+#include <assert.h>
+
/* Harfbuzz has some major design flaws.
*
* It is utterly thread unsafe. It uses statics to hold