diff --git a/pkg/modgearman/configuration_parser.go b/pkg/modgearman/configuration_parser.go
index 10d6d51..50eb1c1 100644
--- a/pkg/modgearman/configuration_parser.go
+++ b/pkg/modgearman/configuration_parser.go
@@ -40,7 +40,7 @@ type config struct {
 	loadLimit5                float64
 	loadLimit15               float64
 	loadCPUMulti              float64
-	memLimit                  int
+	memLimit                  uint64
 	backgroundingThreshold    int
 	showErrorOutput           bool
 	dupResultsArePassive      bool
@@ -277,7 +277,7 @@ func (config *config) parseConfigItem(raw string) error {
 	case "load_cpu_multi":
 		config.loadCPUMulti = getFloat(value)
 	case "mem_limit":
-		config.memLimit = getInt(value)
+		config.memLimit = uint64(getFloat(value))
 	case "backgrounding-threshold":
 		config.backgroundingThreshold = getInt(value)
 	case "show_error_output":
diff --git a/pkg/modgearman/mainWorker.go b/pkg/modgearman/mainWorker.go
index 747f0cc..90305bd 100644
--- a/pkg/modgearman/mainWorker.go
+++ b/pkg/modgearman/mainWorker.go
@@ -414,7 +414,7 @@ func (w *mainWorker) checkMemory() (ok bool, reason string) {
 	}
 
 	usedPercent := 100 - (w.memFree*100)/w.memTotal
-	if w.cfg.memLimit > 0 && usedPercent >= uint64(w.cfg.memLimit) {
+	if w.cfg.memLimit > 0 && usedPercent >= w.cfg.memLimit {
 		reason := fmt.Sprintf("cannot start any more worker, memory usage is too high: %d%% > %d%% (free: %s)",
 			usedPercent,
 			w.cfg.memLimit,
@@ -621,5 +621,6 @@ func bytes2Human(num uint64) string {
 		div *= unit
 		exp++
 	}
+
 	return fmt.Sprintf("%.2f %cB", float64(num)/float64(div), "KMGTPE"[exp])
 }