diff --git a/Changes b/Changes
index 6bd421472..371bd6d57 100644
--- a/Changes
+++ b/Changes
@@ -14,6 +14,7 @@ Verilator 4.221 devel
 **Minor:**
 
 * Split --prof-threads into --prof-exec and --prof-pgo (#3365). [Geza Lore, Shunyao CAD]
+* Fix MSVC localtime_s (#3124).
 
 
 Verilator 4.220 2022-03-12
diff --git a/include/verilatedos.h b/include/verilatedos.h
index 324cc4332..5ba920312 100644
--- a/include/verilatedos.h
+++ b/include/verilatedos.h
@@ -492,10 +492,8 @@ using ssize_t = uint32_t;  ///< signed size_t; returned from read()
 # define VL_STRCASECMP strcasecmp
 #endif
 
-#ifdef __MINGW32__
+#if defined(__MINGW32__) || defined(_MSC_VER)
 # define VL_LOCALTIME_R(timep, tmp) localtime_s((tmp), (timep))
-#elif defined(_MSC_VER)
-# define VL_LOCALTIME_R(timep, tmp) localtime_c((tmp), (timep))
 #else
 # define VL_LOCALTIME_R(timep, tmp) localtime_r((timep), (tmp))
 #endif
diff --git a/src/V3Param.cpp b/src/V3Param.cpp
index cdb4ce9a2..02f545516 100644
--- a/src/V3Param.cpp
+++ b/src/V3Param.cpp
@@ -58,6 +58,7 @@
 #include "V3Unroll.h"
 #include "V3Hasher.h"
 
+#include <cctype>
 #include <deque>
 #include <map>
 #include <memory>