diff --git a/samples/tetris/src/main/kotlin/Tetris.kt b/samples/tetris/src/main/kotlin/Tetris.kt
index 8b05e0ce482..870b0f3f550 100644
--- a/samples/tetris/src/main/kotlin/Tetris.kt
+++ b/samples/tetris/src/main/kotlin/Tetris.kt
@@ -15,6 +15,7 @@
  */
 
 import kotlinx.cinterop.*
+import platform.posix.*
 import sdl.*
 
 typealias Field = Array<ByteArray>