diff --git a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
index 07c6190b390b8..13040cfaa1238 100644
--- a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
+++ b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
@@ -485,14 +485,14 @@ private[spark] object CoarseGrainedExecutorBackend extends Logging {
           .executorResources
           .foreach {
             case (ResourceProfile.OFFHEAP_MEM, request) =>
-              driverConf.set(MEMORY_OFFHEAP_SIZE.key, request.amount.toString)
+              driverConf.set(MEMORY_OFFHEAP_SIZE.key, request.amount.toString + "m")
               driverConf.set(MEMORY_OFFHEAP_ENABLED.key, "true")
               logInfo(s"set off heap memory to $request")
             case (ResourceProfile.MEMORY, request) =>
-              driverConf.set(EXECUTOR_MEMORY.key, request.amount.toString)
+              driverConf.set(EXECUTOR_MEMORY.key, request.amount.toString + "m")
               logInfo(s"set memory to $request")
             case (ResourceProfile.OVERHEAD_MEM, request) =>
-              driverConf.set(EXECUTOR_MEMORY_OVERHEAD.key, request.amount.toString)
+              driverConf.set(EXECUTOR_MEMORY_OVERHEAD.key, request.amount.toString + "m")
               logInfo(s"set memory_overhead to $request")
             case _ =>
           }