diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index ceb5e3a..698990d 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1679,6 +1679,7 @@
                  LibSanitizerArgs.begin(), LibSanitizerArgs.end());
 
   CmdArgs.push_back("-lpthread");
+  CmdArgs.push_back("-lrt");
   CmdArgs.push_back("-ldl");
 
   // If possible, use a dynamic symbols file to export the symbols from the
diff --git a/test/Driver/sanitizer-ld.c b/test/Driver/sanitizer-ld.c
index fd68b57..fd7e97f 100644
--- a/test/Driver/sanitizer-ld.c
+++ b/test/Driver/sanitizer-ld.c
@@ -10,6 +10,7 @@
 // CHECK-ASAN-LINUX-NOT: "-lc"
 // CHECK-ASAN-LINUX: libclang_rt.asan-i386.a"
 // CHECK-ASAN-LINUX: "-lpthread"
+// CHECK-ASAN-LINUX: "-lrt"
 // CHECK-ASAN-LINUX: "-ldl"
 // CHECK-ASAN-LINUX-NOT: "-export-dynamic"
 // CHECK-ASAN-LINUX: "--dynamic-list={{.*}}libclang_rt.asan-i386.a.syms"
@@ -24,6 +25,7 @@
 // CHECK-ASAN-LINUX-CXX-NOT: "-lc"
 // CHECK-ASAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.asan-i386.a" "-no-whole-archive"
 // CHECK-ASAN-LINUX-CXX: "-lpthread"
+// CHECK-ASAN-LINUX-CXX: "-lrt"
 // CHECK-ASAN-LINUX-CXX: "-ldl"
 // CHECK-ASAN-LINUX-CXX: "-export-dynamic"
 // CHECK-ASAN-LINUX-CXX-NOT: "--dynamic-list"
@@ -70,6 +72,7 @@
 // CHECK-TSAN-LINUX-CXX-NOT: stdc++
 // CHECK-TSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.tsan-x86_64.a" "-no-whole-archive"
 // CHECK-TSAN-LINUX-CXX: "-lpthread"
+// CHECK-TSAN-LINUX-CXX: "-lrt"
 // CHECK-TSAN-LINUX-CXX: "-ldl"
 // CHECK-TSAN-LINUX-CXX-NOT: "-export-dynamic"
 // CHECK-TSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.tsan-x86_64.a.syms"
@@ -85,6 +88,7 @@
 // CHECK-MSAN-LINUX-CXX-NOT: stdc++
 // CHECK-MSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.msan-x86_64.a" "-no-whole-archive"
 // CHECK-MSAN-LINUX-CXX: "-lpthread"
+// CHECK-MSAN-LINUX-CXX: "-lrt"
 // CHECK-MSAN-LINUX-CXX: "-ldl"
 // CHECK-MSAN-LINUX-CXX-NOT: "-export-dynamic"
 // CHECK-MSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.msan-x86_64.a.syms"