diff --git a/src/msdos/utilsdos.cpp b/src/msdos/utilsdos.cpp
index c876b6939e..799a3fc5e7 100644
--- a/src/msdos/utilsdos.cpp
+++ b/src/msdos/utilsdos.cpp
@@ -488,3 +488,8 @@ wxOperatingSystemId wxGetOsVersion(int *verMaj, int *verMin)
     return wxOS_DOS;
 }
 
+bool wxIsPlatform64Bit()
+{
+    return false;
+}
+