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-rw-r--r--lib/fpending.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/fpending.h b/lib/fpending.h
index 4eca3f18e17..30d67fcd74f 100644
--- a/lib/fpending.h
+++ b/lib/fpending.h
@@ -25,5 +25,5 @@
#endif
#ifndef __fpending
-size_t __fpending (FILE *);
+size_t __fpending (FILE *) _GL_ATTRIBUTE_PURE;
#endif