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-rw-r--r--absl/time/clock_test.cc4
1 files changed, 3 insertions, 1 deletions
diff --git a/absl/time/clock_test.cc b/absl/time/clock_test.cc
index e6f627b3..bc77dbc2 100644
--- a/absl/time/clock_test.cc
+++ b/absl/time/clock_test.cc
@@ -18,8 +18,10 @@
#if defined(ABSL_HAVE_ALARM)
#include <signal.h>
#include <unistd.h>
-#elif defined(_AIX)
+#ifdef _AIX
+// sig_t is not defined in AIX.
typedef void (*sig_t)(int);
+#endif
#elif defined(__linux__) || defined(__APPLE__)
#error all known Linux and Apple targets have alarm
#endif