diff --git a/suite/regress/x86_mem_size.py b/suite/regress/x86_mem_size.py
new file mode 100644
index 0000000000000000000000000000000000000000..cff6ba84f543e0b17fe6ceb3fa946065e2cca2fe
--- /dev/null
+++ b/suite/regress/x86_mem_size.py
@@ -0,0 +1,21 @@
+#!/usr/bin/python
+
+# Github issue: #73
+# Author: fvrmatteo
+# Description: missing memory size indicator
+
+from keystone import *
+
+import regress
+
+class TestX86(regress.RegressTest):
+		def runTest(self):
+			# Initialize Keystone engine
+			ks = Ks(KS_ARCH_X86, KS_MODE_32)
+			# Assemble to get back insn encoding & statement count
+			encoding, count = ks.asm(b"add ptr ss:[eax + ebx], 0x777")
+			# Assert the result
+			self.assertEqual(encoding, [])
+
+if __name__ == '__main__'
+	regress.main()
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