diff --git a/runtime/flang/global.h b/runtime/flang/global.h
index 59a755ef0da..cab3448de5b 100644
--- a/runtime/flang/global.h
+++ b/runtime/flang/global.h
@@ -28,16 +28,10 @@
 /* declarations needed where integer*8 & logical*8 are supported and
  * the natural integer is integer*4 (__BIGINT is __INT4).
  */
-#ifndef _WIN32
 typedef int FLANG_INT64[2];
 typedef unsigned int FLANG_UINT64[2];
 #define I64_MSH(t) t[1]
 #define I64_LSH(t) t[0]
-#else
-#include <windows.h>
-#define I64_MSH(t) ((int*)((void *)&t))[1]
-#define I64_LSH(t) ((int*)((void *)&t))[0]
-#endif
 
 
 extern int __ftn_32in64_;
diff --git a/runtime/flang/miscsup_com.c b/runtime/flang/miscsup_com.c
index 7eb9d053211..053c5917db0 100644
--- a/runtime/flang/miscsup_com.c
+++ b/runtime/flang/miscsup_com.c
@@ -28,6 +28,8 @@
 #ifndef _WIN32
 #include <sys/time.h>
 #include <unistd.h>
+#else
+#include <winsock2.h>
 #endif
 #include "stdioInterf.h"
 #include "fioMacros.h"
diff --git a/runtime/flangrti/CMakeLists.txt b/runtime/flangrti/CMakeLists.txt
index 0bc427e749b..82cbe1bfb6b 100644
--- a/runtime/flangrti/CMakeLists.txt
+++ b/runtime/flangrti/CMakeLists.txt
@@ -231,9 +231,10 @@ target_include_directories(flangrti_shared
 set_target_properties(flangrti_shared flangrti_static
                       PROPERTIES ARCHIVE_OUTPUT_DIRECTORY ${FLANG_RTE_LIB_DIR})
 
-target_compile_options(flangrti_static PRIVATE -fPIC)
-
-target_compile_options(flangrti_shared PRIVATE -fPIC)
+if (NOT MSVC)
+  target_compile_options(flangrti_static PRIVATE -fPIC)
+  target_compile_options(flangrti_shared PRIVATE -fPIC)
+endif()
 
 target_compile_options(flangrti_static PUBLIC $<$<COMPILE_LANGUAGE:Fortran>:-Mreentrant>)
 
diff --git a/runtime/flangrti/iostdinit.c b/runtime/flangrti/iostdinit.c
index 2d0d51928d7..b769389296d 100644
--- a/runtime/flangrti/iostdinit.c
+++ b/runtime/flangrti/iostdinit.c
@@ -294,7 +294,7 @@ __io_timezone(void *tm)
 /* OT 10 */
 void * 
 _pgi_get_iob(int xx) {
-	 return & __iob_func()[xx];
+	 return __acrt_iob_func(xx);
 }
 
 #endif