diff --git a/src/m_swap.h b/src/m_swap.h
index 6e0bc88cc..82751fd47 100644
--- a/src/m_swap.h
+++ b/src/m_swap.h
@@ -29,51 +29,51 @@
 // WAD files are stored little endian.
 
 #ifdef __APPLE__
-#include <CoreFoundation/CoreFoundation.h>
+#include <libkern/OSByteOrder.h>
 
 inline short LittleShort(short x)
 {
-	return (short)CFSwapInt16LittleToHost((uint16_t)x);
+	return (short)OSSwapLittleToHostInt16((uint16_t)x);
 }
 
 inline unsigned short LittleShort(unsigned short x)
 {
-	return CFSwapInt16LittleToHost(x);
+	return OSSwapLittleToHostInt16(x);
 }
 
 inline short LittleShort(int x)
 {
-	return CFSwapInt16LittleToHost((uint16_t)x);
+	return OSSwapLittleToHostInt16((uint16_t)x);
 }
 
 inline int LittleLong(int x)
 {
-	return CFSwapInt32LittleToHost((uint32_t)x);
+	return OSSwapLittleToHostInt32((uint32_t)x);
 }
 
 inline unsigned int LittleLong(unsigned int x)
 {
-	return CFSwapInt32LittleToHost(x);
+	return OSSwapLittleToHostInt32(x);
 }
 
 inline short BigShort(short x)
 {
-	return (short)CFSwapInt16BigToHost((uint16_t)x);
+	return (short)OSSwapBigToHostInt16((uint16_t)x);
 }
 
 inline unsigned short BigShort(unsigned short x)
 {
-	return CFSwapInt16BigToHost(x);
+	return OSSwapBigToHostInt16(x);
 }
 
 inline int BigLong(int x)
 {
-	return CFSwapInt32BigToHost((uint32_t)x);
+	return OSSwapBigToHostInt32((uint32_t)x);
 }
 
 inline unsigned int BigLong(unsigned int x)
 {
-	return CFSwapInt32BigToHost(x);
+	return OSSwapBigToHostInt32(x);
 }
 
 #else
diff --git a/src/sdl/i_main.cpp b/src/sdl/i_main.cpp
index 3c721ae51..27324edf6 100644
--- a/src/sdl/i_main.cpp
+++ b/src/sdl/i_main.cpp
@@ -303,8 +303,8 @@ int main (int argc, char **argv)
 		vid_defwidth  = videoInfo->current_w;
 		vid_defheight = videoInfo->current_h;
 		vid_defbits   = videoInfo->vfmt->BitsPerPixel;
-		vid_vsync     = True;
-		fullscreen    = True;
+		vid_vsync     = true;
+		fullscreen    = true;
 	}
 	
 #endif // __APPLE__
diff --git a/src/thingdef/thingdef_properties.cpp b/src/thingdef/thingdef_properties.cpp
index 3b61bedca..81452c7b0 100644
--- a/src/thingdef/thingdef_properties.cpp
+++ b/src/thingdef/thingdef_properties.cpp
@@ -167,7 +167,7 @@ INTBOOL CheckActorFlag(const AActor *owner, FFlagDef *fd)
 	{
 		return fd->flagbit & *(DWORD *)(((char*)owner) + fd->structoffset);
 	}
-#ifdef __BID_ENDIAN__
+#ifdef __BIG_ENDIAN__
 	else if (fd->fieldsize == 2)
 	{
 		return fd->flagbit & *(WORD *)(((char*)owner) + fd->structoffset);