diff --git a/Makefile b/Makefile
index f34b3d4..8e2ed8b 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ SYSPREFIX = /usr
 ICONSPREFIX = $(SYSPREFIX)/share/icons
 XSESSIONSPREFIX = $(SYSPREFIX)/share/xsessions
 
-SRC = Cargo.toml src/main.rs
+SRC = Cargo.toml src/main.rs src/task.rs
 
 target/debug/polytree-session: $(SRC)
 	cargo build