diff --git a/build_windows.sh b/build_windows.sh
index 648c05e..794e04f 100755
--- a/build_windows.sh
+++ b/build_windows.sh
@@ -4,7 +4,7 @@
 
 export CC_FLAGS="-Wall -std=c++11 -O3 -flto -pthread -mtune=generic -fno-exceptions -static"
 export LD_FLAGS="-pthread -flto -static"
-export CXX=x86_64-w64-mingw32-g++-posix
+export CXX=i686-w64-mingw32-g++-posix
 make clean
 make -j4
 mv shallowblue shallowblue_x86-64.exe
diff --git a/src/option.h b/src/option.h
index dff8021..65052a0 100644
--- a/src/option.h
+++ b/src/option.h
@@ -2,6 +2,7 @@
 #define OPTIONMANAGER_H
 
 #include <map>
+#include <string>
 
 /**
  * @brief Type of callback function for when an option is changed
diff --git a/src/uci.h b/src/uci.h
index c0a67de..a7486a9 100644
--- a/src/uci.h
+++ b/src/uci.h
@@ -10,6 +10,7 @@
 #include <fstream>
 #include <memory>
 
+
 /**
  * @brief Class for handling UCI input/output.
  */