diff --git a/src/sysinfo.cc b/src/sysinfo.cc
index 24ab6d6b..59769e24 100644
--- a/src/sysinfo.cc
+++ b/src/sysinfo.cc
@@ -16,6 +16,7 @@
 
 #ifdef BENCHMARK_OS_WINDOWS
 #include <Shlwapi.h>
+#undef StrCat // Don't let StrCat in string_util.h be renamed to lstrcatA
 #include <VersionHelpers.h>
 #include <Windows.h>
 #else
diff --git a/src/timers.cc b/src/timers.cc
index 893cd382..701e4577 100644
--- a/src/timers.cc
+++ b/src/timers.cc
@@ -17,6 +17,7 @@
 
 #ifdef BENCHMARK_OS_WINDOWS
 #include <Shlwapi.h>
+#undef StrCat // Don't let StrCat in string_util.h be renamed to lstrcatA
 #include <VersionHelpers.h>
 #include <Windows.h>
 #else