diff --git a/C/Makefile.oldlinux b/C/Makefile.oldlinux
new file mode 100644
index 0000000..3756fa0
--- /dev/null
+++ b/C/Makefile.oldlinux
@@ -0,0 +1,4 @@
+CFLAGS = -O9 -Wall -std=gnu99
+LDFLAGS = -lrt
+
+all: eratosthenes_1sec