diff --git a/backend/installfinders/launchers/epic/epic_wine_unix.go b/backend/installfinders/launchers/epic/epic_wine_unix.go
index 260eb705..01bd1267 100644
--- a/backend/installfinders/launchers/epic/epic_wine_unix.go
+++ b/backend/installfinders/launchers/epic/epic_wine_unix.go
@@ -16,7 +16,7 @@ func FindInstallationsWine(winePrefix string, launcher string, launchPath []stri
 	platform := common.WineLauncherPlatform(winePrefix)
 
 	if _, err := os.Stat(platform.ProcessPath(epicWineManifestPath)); os.IsNotExist(err) {
-		return nil, []error{fmt.Errorf("Epic is not installed in " + winePrefix)}
+		return nil, []error{fmt.Errorf("Epic is not installed in %s", winePrefix)}
 	}
 
 	return FindInstallationsEpic(
diff --git a/backend/installfinders/launchers/steam/steam_wine_darwin.go b/backend/installfinders/launchers/steam/steam_wine_darwin.go
index 238c84db..39f81c08 100644
--- a/backend/installfinders/launchers/steam/steam_wine_darwin.go
+++ b/backend/installfinders/launchers/steam/steam_wine_darwin.go
@@ -17,7 +17,7 @@ func FindInstallationsWine(winePrefix string, launcher string, launchPath []stri
 	platform := common.WineLauncherPlatform(winePrefix)
 
 	if _, err := os.Stat(platform.ProcessPath(steamWinePath)); os.IsNotExist(err) {
-		return nil, []error{fmt.Errorf("Steam is not installed in " + winePrefix)}
+		return nil, []error{fmt.Errorf("Steam is not installed in %s", winePrefix)}
 	}
 
 	return FindInstallationsSteam(