diff --git a/main/src/main/scala/sbt/internal/SysProp.scala b/main/src/main/scala/sbt/internal/SysProp.scala
index 557fadb2d..4e0055710 100644
--- a/main/src/main/scala/sbt/internal/SysProp.scala
+++ b/main/src/main/scala/sbt/internal/SysProp.scala
@@ -90,7 +90,7 @@ object SysProp {
 
   def fileCacheSize: Long =
     SizeParser(System.getProperty("sbt.file.cache.size", "128M")).getOrElse(128L * 1024 * 1024)
-  def dumbTerm: Boolean = sys.env.get("TERM").filter(_ == "dumb").isDefined
+  def dumbTerm: Boolean = sys.env.get("TERM").contains("dumb")
   def supershell: Boolean = booleanOpt("sbt.supershell").getOrElse(!dumbTerm && color)
 
   def supershellSleep: Long = long("sbt.supershell.sleep", 100L)