diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 3af67bf8e0..4ca978338f 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -97,9 +97,11 @@ if(PKG_KOKKOS AND (CMAKE_CXX_STANDARD LESS 14))
 endif()
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF CACHE BOOL "Use compiler extensions")
-# ugly hack for MSVC which by default always reports an old C++ standard in the __cplusplus macro
+# ugly hacks for MSVC which by default always reports an old C++ standard in the __cplusplus macro
+# and prints lots of pointless warnings about "unsafe" functions
 if(MSVC)
   add_compile_options(/Zc:__cplusplus)
+  add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
 endif()
 
 # export all symbols when building a .dll file on windows
diff --git a/src/dump.cpp b/src/dump.cpp
index 637ded53d0..7dbe95c1d3 100644
--- a/src/dump.cpp
+++ b/src/dump.cpp
@@ -196,7 +196,7 @@ Dump::~Dump()
 
   if (multifile == 0 && fp != nullptr) {
     if (compressed) {
-      if (filewriter) pclose(fp);
+      if (filewriter) platform::pclose(fp);
     } else {
       if (filewriter) fclose(fp);
     }
@@ -518,7 +518,7 @@ void Dump::write()
 
   if (multifile) {
     if (compressed) {
-      if (filewriter && fp != nullptr) pclose(fp);
+      if (filewriter && fp != nullptr) platform::pclose(fp);
     } else {
       if (filewriter && fp != nullptr) fclose(fp);
     }