diff --git a/sal/osl/w32/process.cxx b/sal/osl/w32/process.cxx
index 6506b62dbd61..3fec90a8483a 100644
--- a/sal/osl/w32/process.cxx
+++ b/sal/osl/w32/process.cxx
@@ -28,6 +28,7 @@
 
 #define UNICODE
 #include "system.h"
+#include <string.h>
 #ifdef _MSC_VER
 #pragma warning(push,1) /* disable warnings within system headers */
 #endif
@@ -419,7 +420,15 @@ oslProcessError SAL_CALL osl_setEnvironment(rtl_uString *ustrVar, rtl_uString *u
     LPCWSTR lpName = reinterpret_cast<LPCWSTR>(ustrVar->buffer);
     LPCWSTR lpValue = reinterpret_cast<LPCWSTR>(ustrValue->buffer);
     if (SetEnvironmentVariableW(lpName, lpValue))
+    {
+        wchar_t *buffer = new wchar_t[wcslen(lpName) + 1 + wcslen(lpValue) + 1];
+        wcscpy(buffer, lpName);
+        wcscat(buffer, L"=");
+        wcscat(buffer, lpValue);
+        _wputenv(buffer);
+        delete[] buffer;
         return osl_Process_E_None;
+    }
     return osl_Process_E_Unknown;
 }
 
@@ -429,7 +438,14 @@ oslProcessError SAL_CALL osl_clearEnvironment(rtl_uString *ustrVar)
     //process's environment.
     LPCWSTR lpName = reinterpret_cast<LPCWSTR>(ustrVar->buffer);
     if (SetEnvironmentVariableW(lpName, NULL))
+    {
+        wchar_t *buffer = new wchar_t[wcslen(lpName) + 1 + 1];
+        wcscpy(buffer, lpName);
+        wcscat(buffer, L"=");
+        _wputenv(buffer);
+        delete[] buffer;
         return osl_Process_E_None;
+    }
     return osl_Process_E_Unknown;
 }