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-rw-r--r--libavutil/adler32.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavutil/adler32.h b/libavutil/adler32.h
index 2e29e05b25..91dff9a4ec 100644
--- a/libavutil/adler32.h
+++ b/libavutil/adler32.h
@@ -24,6 +24,6 @@
#include <stdint.h>
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf,
- unsigned int len);
+ unsigned int len) av_pure;
#endif /* FFMPEG_ADLER32_H */