diff --git a/config/security/securityConfig.go b/config/security/securityConfig.go
index e3bffedca..be9e901f1 100644
--- a/config/security/securityConfig.go
+++ b/config/security/securityConfig.go
@@ -42,7 +42,7 @@ var DefaultConfig = Config{
 		),
 		// These have been tested to work with Hugo's external programs
 		// on Windows, Linux and MacOS.
-		OsEnv: MustNewWhitelist(`(?i)^((HTTPS?|NO)_PROXY|PATH(EXT)?|APPDATA|TE?MP|TERM|GO\w+|(XDG_CONFIG_)?HOME|USERPROFILE|SSH_AUTH_SOCK|DISPLAY|LANG)$`),
+		OsEnv: MustNewWhitelist(`(?i)^((HTTPS?|NO)_PROXY|PATH(EXT)?|APPDATA|TE?MP|TERM|GO\w+|(XDG_CONFIG_)?HOME|USERPROFILE|SSH_AUTH_SOCK|DISPLAY|LANG|SYSTEMDRIVE)$`),
 	},
 	Funcs: Funcs{
 		Getenv: MustNewWhitelist("^HUGO_", "^CI$"),
diff --git a/config/security/securityConfig_test.go b/config/security/securityConfig_test.go
index 3d58288c9..57e615a48 100644
--- a/config/security/securityConfig_test.go
+++ b/config/security/securityConfig_test.go
@@ -135,7 +135,7 @@ func TestToTOML(t *testing.T) {
 	got := DefaultConfig.ToTOML()
 
 	c.Assert(got, qt.Equals,
-		"[security]\n  enableInlineShortcodes = false\n\n  [security.exec]\n    allow = ['^(dart-)?sass(-embedded)?$', '^go$', '^npx$', '^postcss$']\n    osEnv = ['(?i)^((HTTPS?|NO)_PROXY|PATH(EXT)?|APPDATA|TE?MP|TERM|GO\\w+|(XDG_CONFIG_)?HOME|USERPROFILE|SSH_AUTH_SOCK|DISPLAY|LANG)$']\n\n  [security.funcs]\n    getenv = ['^HUGO_', '^CI$']\n\n  [security.http]\n    methods = ['(?i)GET|POST']\n    urls = ['.*']",
+		"[security]\n  enableInlineShortcodes = false\n\n  [security.exec]\n    allow = ['^(dart-)?sass(-embedded)?$', '^go$', '^npx$', '^postcss$']\n    osEnv = ['(?i)^((HTTPS?|NO)_PROXY|PATH(EXT)?|APPDATA|TE?MP|TERM|GO\\w+|(XDG_CONFIG_)?HOME|USERPROFILE|SSH_AUTH_SOCK|DISPLAY|LANG|SYSTEMDRIVE)$']\n\n  [security.funcs]\n    getenv = ['^HUGO_', '^CI$']\n\n  [security.http]\n    methods = ['(?i)GET|POST']\n    urls = ['.*']",
 	)
 }