diff --git a/src/os_win32.c b/src/os_win32.c
index edd5cda..89c7c5e 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -822,7 +822,7 @@
 #endif
 
 /*
- * Set "win8_or_later" and fill in "windowsVersion".
+ * Set "win8_or_later" and fill in "windowsVersion" if possible.
  */
     void
 PlatformId(void)
@@ -836,9 +836,10 @@
 	ovi.dwOSVersionInfoSize = sizeof(ovi);
 	GetVersionEx(&ovi);
 
+#ifdef FEAT_EVAL
 	vim_snprintf(windowsVersion, sizeof(windowsVersion), "%d.%d",
 		(int)ovi.dwMajorVersion, (int)ovi.dwMinorVersion);
-
+#endif
 	if ((ovi.dwMajorVersion == 6 && ovi.dwMinorVersion >= 2)
 		|| ovi.dwMajorVersion > 6)
 	    win8_or_later = TRUE;