diff --git a/mysqltuner.pl b/mysqltuner.pl
index a51825e..9ad8191 100755
--- a/mysqltuner.pl
+++ b/mysqltuner.pl
@@ -226,8 +226,8 @@ sub os_setup {
 		}
 	} else {
 		if ($os =~ /Linux/) {
-			$physical_memory = `free -b | grep Mem | awk '{print \$2}'` or memerror;
-			$swap_memory = `free -b | grep Swap | awk '{print \$2}'` or memerror;
+			$physical_memory = `LANG=en free -b | grep Mem | awk '{print \$2}'` or memerror;
+			$swap_memory = `LANG=en free -b | grep Swap | awk '{print \$2}'` or memerror;
 		} elsif ($os =~ /Darwin/) {
 			$physical_memory = `sysctl -n hw.memsize` or memerror;
 			$swap_memory = `sysctl -n vm.swapusage | awk '{print \$3}' | sed 's/\..*\$//'` or memerror;