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-rw-r--r--src/systime.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/systime.h b/src/systime.h
index 125b2f1385e..2f783efcfca 100644
--- a/src/systime.h
+++ b/src/systime.h
@@ -41,6 +41,8 @@ typedef unsigned long Time;
#endif
#include <sys/time.h> /* for 'struct timeval' */
+
+#undef hz /* AIX <sys/param.h> #defines this. */
/* Emacs uses struct timespec to represent nonnegative temporal intervals.