diff -uNr 0ad-0.0.22-alpha.orig/source/gui/CDropDown.cpp 0ad-0.0.22-alpha/source/gui/CDropDown.cpp

--- 0ad-0.0.22-alpha.orig/source/gui/CDropDown.cpp	2017-06-30 01:39:12.000000000 +0200

+++ 0ad-0.0.22-alpha/source/gui/CDropDown.cpp	2017-07-27 10:03:04.647238245 +0200

@@ -352,7 +352,7 @@

 					int diff = 0;

 					for (size_t j = 0; j < m_InputBuffer.length(); ++j)

 					{

-						diff = std::abs(pList->m_Items[i].GetRawString().LowerCase()[j] - (int)m_InputBuffer[j]);

+						diff = std::abs((int)pList->m_Items[i].GetRawString().LowerCase()[j] - (int)m_InputBuffer[j]);

 						if (diff == 0)

 							indexOfDifference = j+1;

 						else