diff --git a/Makefile b/Makefile
index 1668139a25..a222fa572a 100644
--- a/Makefile
+++ b/Makefile
@@ -95,7 +95,7 @@ ifeq ($(kernel_name),SunOS)
     BSON_DYLIB_MAKE_CMD=$(CC) -G -o $(BSON_DYLIBNAME) -h $(BSON_DYLIB_MINOR_NAME) $(ALL_LDFLAGS)
 endif
 ifeq ($(kernel_name),Darwin)
-    ALL_CFLAGS+=-std=$(STD) $(CFLAGS) $(OPTIMIZATION) $(WARNINGS) $(DEBUG) $(ALL_DEFINES) -DMONGO_OSX_
+    ALL_CFLAGS+=-std=$(STD) $(CFLAGS) $(OPTIMIZATION) $(WARNINGS) $(DEBUG) $(ALL_DEFINES)
     DYLIBSUFFIX=dylib
     MONGO_DYLIB_MINOR_NAME=$(MONGO_LIBNAME).$(DYLIBSUFFIX).$(MONGO_MAJOR).$(MONGO_MINOR)
     MONGO_DYLIB_MAJOR_NAME=$(MONGO_LIBNAME).$(DYLIBSUFFIX).$(MONGO_MAJOR)
diff --git a/SConstruct b/SConstruct
index b712a5d007..55d1967b00 100644
--- a/SConstruct
+++ b/SConstruct
@@ -92,10 +92,7 @@ else:
 
 
 if os.sys.platform in ["darwin", "linux2"]:
-    if os.sys.platform in ["darwin"]:
-        env.Append( CPPFLAGS=" -pedantic -Wall -ggdb -DMONGO_HAVE_STDINT -DMONGO_OSX_" )
-    else:
-        env.Append( CPPFLAGS=" -pedantic -Wall -ggdb -DMONGO_HAVE_STDINT" )
+    env.Append( CPPFLAGS=" -pedantic -Wall -ggdb -DMONGO_HAVE_STDINT" )
     env.Append( CPPPATH=["/opt/local/include/"] )
     env.Append( LIBPATH=["/opt/local/lib/"] )
 
diff --git a/src/env_default.c b/src/env_default.c
index f82e5478f1..9cbeab3d77 100644
--- a/src/env_default.c
+++ b/src/env_default.c
@@ -29,7 +29,7 @@ int mongo_write_socket( mongo *conn, const void *buf, int len ) {
 #ifdef _WIN32
     int flags = 0;
 #else
-#ifdef MONGO_OSX_
+#ifdef __APPLE__
     int flags = 0;
 #else
     int flags = MSG_NOSIGNAL;
diff --git a/src/env_posix.c b/src/env_posix.c
index 0ec811908e..8d27e4d5c3 100644
--- a/src/env_posix.c
+++ b/src/env_posix.c
@@ -43,11 +43,7 @@ static void mongo_set_error( mongo *conn, int err, const char *str ) {
 
 int mongo_write_socket( mongo *conn, const void *buf, int len ) {
     const char *cbuf = buf;
-#ifdef MONGO_OSX_
-    int flags = 0;
-#else
     int flags = MSG_NOSIGNAL;
-#endif
 
     while ( len ) {
         int sent = send( conn->sock, cbuf, len, flags );