diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index f1ebec6b..430214ea 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -306,7 +306,7 @@ isEmpty(BOOST_INCLUDE_PATH) {
     macx:BOOST_INCLUDE_PATH = /opt/local/include
 }
 
-windows:LIBS += -lws2_32 -lshlwapi
+windows:LIBS += -lws2_32 -lshlwapi -lmswsock
 windows:DEFINES += WIN32
 windows:RC_FILE = src/qt/res/bitcoin-qt.rc
 
diff --git a/src/makefile.linux-mingw b/src/makefile.linux-mingw
index 51f49bb3..cd8e9708 100644
--- a/src/makefile.linux-mingw
+++ b/src/makefile.linux-mingw
@@ -39,7 +39,7 @@ ifdef USE_UPNP
 	DEFS += -DSTATICLIB -DUSE_UPNP=$(USE_UPNP)
 endif
 
-LIBS += -l mingwthrd -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l shlwapi
+LIBS += -l mingwthrd -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l mswsock -l shlwapi
 
 # TODO: make the mingw builds smarter about dependencies, like the linux/osx builds are
 HEADERS = $(wildcard *.h)
diff --git a/src/makefile.mingw b/src/makefile.mingw
index 577c77b7..919be007 100644
--- a/src/makefile.mingw
+++ b/src/makefile.mingw
@@ -36,7 +36,7 @@ ifdef USE_UPNP
  DEFS += -DSTATICLIB -DUSE_UPNP=$(USE_UPNP)
 endif
 
-LIBS += -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l shlwapi
+LIBS += -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell32 -l comctl32 -l ole32 -l oleaut32 -l uuid -l rpcrt4 -l advapi32 -l ws2_32 -l mswsock -l shlwapi
 
 # TODO: make the mingw builds smarter about dependencies, like the linux/osx builds are
 HEADERS = $(wildcard *.h)