4 files changed, 24 insertions, 4 deletions
diff --git a/src/makefile.linux-mingw b/src/makefile.linux-mingw
index e22a9f38ea..174d0eee1b 100644
--- a/src/makefile.linux-mingw
+++ b/src/makefile.linux-mingw
@@ -5,6 +5,7 @@
 DEPSDIR:=/usr/i586-mingw32msvc
 
 USE_UPNP:=0
+USE_IPV6:=1
 
 INCLUDEPATHS= \
  -I"$(CURDIR)" \
@@ -28,7 +29,7 @@ LIBS= \
  -l ssl \
  -l crypto
 
-DEFS=-D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE -DUSE_IPV6
+DEFS=-D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE
 DEBUGFLAGS=-g
 CFLAGS=-O2 -w -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
@@ -40,6 +41,10 @@ ifdef USE_UPNP
 	DEFS += -DSTATICLIB -DUSE_UPNP=$(USE_UPNP)
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+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 mswsock -l shlwapi
 
 # TODO: make the mingw builds smarter about dependencies, like the linux/osx builds are
diff --git a/src/makefile.mingw b/src/makefile.mingw
index 74897656a9..22dc4801c1 100644
--- a/src/makefile.mingw
+++ b/src/makefile.mingw
@@ -3,6 +3,7 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 USE_UPNP:=0
+USE_IPV6:=1
 
 INCLUDEPATHS= \
  -I"C:\boost-1.49.0-mgw" \
@@ -23,7 +24,7 @@ LIBS= \
  -l ssl \
  -l crypto
 
-DEFS=-DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE -DUSE_IPV6
+DEFS=-DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -DBOOST_SPIRIT_THREADSAFE
 DEBUGFLAGS=-g
 CFLAGS=-mthreads -O2 -w -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter $(DEBUGFLAGS) $(DEFS) $(INCLUDEPATHS)
 
@@ -36,6 +37,10 @@ ifdef USE_UPNP
  DEFS += -DSTATICLIB -DUSE_UPNP=$(USE_UPNP)
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+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 mswsock -l shlwapi
 
 # TODO: make the mingw builds smarter about dependencies, like the linux/osx builds are
diff --git a/src/makefile.osx b/src/makefile.osx
index 977878398c..ef193337f2 100644
--- a/src/makefile.osx
+++ b/src/makefile.osx
@@ -20,6 +20,7 @@ LIBPATHS= \
  -L"$(DEPSDIR)/lib/db48"
 
 USE_UPNP:=1
+USE_IPV6:=1
 
 LIBS= -dead_strip
 
@@ -53,7 +54,7 @@ LIBS += \
 TESTDEFS += -DBOOST_TEST_DYN_LINK
 endif
 
-DEFS=-DMAC_OSX -DMSG_NOSIGNAL=0 -DBOOST_SPIRIT_THREADSAFE -DUSE_IPV6
+DEFS=-DMAC_OSX -DMSG_NOSIGNAL=0 -DBOOST_SPIRIT_THREADSAFE
 
 ifdef RELEASE
 # Compile for maximum compatibility and smallest size.
@@ -105,6 +106,10 @@ else
 endif
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+endif
+
 all: bitcoind
 
 # auto-generated dependencies:
diff --git a/src/makefile.unix b/src/makefile.unix
index c9a09ad020..81337148d3 100644
--- a/src/makefile.unix
+++ b/src/makefile.unix
@@ -3,10 +3,11 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 USE_UPNP:=0
+USE_IPV6:=1
 
 LINK:=$(CXX)
 
-DEFS=-DUSE_IPV6 -DBOOST_SPIRIT_THREADSAFE
+DEFS=-DBOOST_SPIRIT_THREADSAFE
 
 DEFS += $(addprefix -I,$(CURDIR) $(CURDIR)/obj $(BOOST_INCLUDE_PATH) $(BDB_INCLUDE_PATH) $(OPENSSL_INCLUDE_PATH))
 LIBS = $(addprefix -L,$(BOOST_LIB_PATH) $(BDB_LIB_PATH) $(OPENSSL_LIB_PATH))
@@ -43,6 +44,10 @@ ifneq (${USE_UPNP}, -)
 	DEFS += -DUSE_UPNP=$(USE_UPNP)
 endif
 
+ifneq (${USE_IPV6}, -)
+	DEFS += -DUSE_IPV6
+endif
+
 LIBS+= \
  -Wl,-B$(LMODE2) \
    -l z \