diff --git a/src/corelib/io/qprocess_win.cpp b/src/corelib/io/qprocess_win.cpp
index 0c8becc3de..c9b1ba4089 100644
--- a/src/corelib/io/qprocess_win.cpp
+++ b/src/corelib/io/qprocess_win.cpp
@@ -294,7 +294,7 @@ QProcessEnvironment QProcessEnvironment::systemEnvironment()
             }
             entry += entryLen + 1;
         }
-        FreeEnvironmentStrings(envStrings);
+        FreeEnvironmentStringsW(envStrings);
     }
     return env;
 }