diff --git a/src/add-ons/kernel/file_systems/exfat/Volume.cpp b/src/add-ons/kernel/file_systems/exfat/Volume.cpp
index 838ec56815..7a633198ce 100644
--- a/src/add-ons/kernel/file_systems/exfat/Volume.cpp
+++ b/src/add-ons/kernel/file_systems/exfat/Volume.cpp
@@ -386,8 +386,8 @@ Volume::Mount(const char* deviceName, uint32 flags)
 		double size = double((10 * diskSize + divisor - 1) / divisor);
 			// %g in the kernel does not support precision...
 
-		snprintf(fName, 11 + 1, "%g %cB ExFAT", size / 10, unit);
-			// exfat volume names can only contain 11 characters
+		snprintf(fName, sizeof(fName), "%g %cB ExFAT Volume",
+			size / 10, unit);
 	}
 
 	return B_OK;