diff --git a/vlib/time/time_nix.c.v b/vlib/time/time_nix.c.v
index b95f859d8e..82c7ecfbf1 100644
--- a/vlib/time/time_nix.c.v
+++ b/vlib/time/time_nix.c.v
@@ -50,7 +50,7 @@ pub mut:
 }
 
 // the first arg is defined in include/bits/types.h as `__S32_TYPE`, which is `int`
-fn C.clock_gettime(int, &C.timespec)
+fn C.clock_gettime(int, &C.timespec) int
 
 fn C.nanosleep(req &C.timespec, rem &C.timespec) int
 
diff --git a/vlib/v/trace_calls/tracing_calls_nix.c.v b/vlib/v/trace_calls/tracing_calls_nix.c.v
index 013d3bd536..58b311d2f5 100644
--- a/vlib/v/trace_calls/tracing_calls_nix.c.v
+++ b/vlib/v/trace_calls/tracing_calls_nix.c.v
@@ -7,5 +7,5 @@ pub mut:
 }
 
 fn C.gettid() u32
-fn C.clock_gettime(int, &C.timespec)
+fn C.clock_gettime(int, &C.timespec) int
 fn C.pthread_self() u64