diff --git a/modules/system/boot/systemd.nix b/modules/system/boot/systemd.nix
index 215f625467a6..c958433ff452 100644
--- a/modules/system/boot/systemd.nix
+++ b/modules/system/boot/systemd.nix
@@ -226,7 +226,7 @@ let
           Environment=PATH=${def.path}
           Environment=LD_LIBRARY_PATH=
           ${let env = cfg.globalEnvironment // def.environment;
-            in concatMapStrings (n: "Environment=${n}=${getAttr n env}\n") (attrNames env)}
+            in concatMapStrings (n: "Environment=\"${n}=${getAttr n env}\"\n") (attrNames env)}
           ${optionalString (!def.restartIfChanged) "X-RestartIfChanged=false"}
           ${optionalString (!def.stopIfChanged) "X-StopIfChanged=false"}