diff --git a/docs/umu.1.scd b/docs/umu.1.scd
index 32d8d3bd..47cbd8e9 100644
--- a/docs/umu.1.scd
+++ b/docs/umu.1.scd
@@ -99,7 +99,7 @@ $ WINEPREFIX= GAMEID=0 PROTONPATH= PROTON_VERB=waitforexitandrun umu-run ~/foo.e
 ```
 # Shows environment variables and command at this level
 # Valid values for umu_LOG include: 1, warn, debug
-$ umu_LOG=1 WINEPREFIX= GAMEID=0 PROTONPATH= umu-run ~/foo.exe
+$ UMU_LOG=1 WINEPREFIX= GAMEID=0 PROTONPATH= umu-run ~/foo.exe
 ```
 
 *Example 9. Run a game and set a Proton by its version name*