diff --git a/rules/time/src.c b/rules/time/src.c
index 7d4f8d2c..90fbbdc3 100644
--- a/rules/time/src.c
+++ b/rules/time/src.c
@@ -45,3 +45,9 @@ int f8(struct timeval *tv, void *tz) {
 clockid_t f9() {
   return CLOCK_REALTIME;
 }
+
+clockid_t f10() { return CLOCK_MONOTONIC; }
+
+#ifdef __linux__
+clockid_t f11() { return CLOCK_MONOTONIC_RAW; }
+#endif
diff --git a/rules/time/tgt_refcount.rs b/rules/time/tgt_refcount.rs
index d8aa4204..8100f0d3 100644
--- a/rules/time/tgt_refcount.rs
+++ b/rules/time/tgt_refcount.rs
@@ -170,3 +170,12 @@ fn f8(a0: Ptr<Timeval>, a1: AnyPtr) -> i32 {
 unsafe fn f9() -> nix::time::ClockId {
     nix::time::ClockId::CLOCK_REALTIME
 }
+
+unsafe fn f10() -> nix::time::ClockId {
+    nix::time::ClockId::CLOCK_MONOTONIC
+}
+
+#[cfg(target_os = "linux")]
+unsafe fn f11() -> nix::time::ClockId {
+    nix::time::ClockId::CLOCK_MONOTONIC_RAW
+}
diff --git a/rules/time/tgt_unsafe.rs b/rules/time/tgt_unsafe.rs
index 58bd70de..b1b41c9e 100644
--- a/rules/time/tgt_unsafe.rs
+++ b/rules/time/tgt_unsafe.rs
@@ -55,3 +55,12 @@ unsafe fn f8(a0: *mut libc::timeval, a1: *mut libc::c_void) -> i32 {
 unsafe fn f9() -> libc::clockid_t {
     libc::CLOCK_REALTIME
 }
+
+unsafe fn f10() -> libc::clockid_t {
+    libc::CLOCK_MONOTONIC
+}
+
+#[cfg(target_os = "linux")]
+unsafe fn f11() -> libc::clockid_t {
+    libc::CLOCK_MONOTONIC_RAW
+}