diff --git a/regress/wrong_sp_arm.py b/regress/wrong_sp_arm.py
new file mode 100644
index 00000000..a5d21838
--- /dev/null
+++ b/regress/wrong_sp_arm.py
@@ -0,0 +1,9 @@
+#!/usr/bin/python
+# By Ryan Hileman, issue #16
+
+from unicorn import *
+from unicorn.arm_const import *
+uc = Uc(UC_ARCH_ARM, UC_MODE_32)
+uc.reg_write(ARM_REG_SP, 4)
+print 'Writing 4 to SP'
+print 'SP =', uc.reg_read(ARM_REG_SP)