diff --git a/neo/idlib/math/Simd_AltiVec.h b/neo/idlib/math/Simd_AltiVec.h
index 903caac6..2a5776eb 100644
--- a/neo/idlib/math/Simd_AltiVec.h
+++ b/neo/idlib/math/Simd_AltiVec.h
@@ -95,7 +95,9 @@ If you have questions concerning this license or the applicable additional terms
 
 // This turns on support for PPC intrinsics in the SIMD_AltiVec.cpp file. Right now it's only used for frsqrte. GCC
 // supports these intrinsics but XLC does not.
-#define PPC_INTRINSICS
+#if defined(__GNUC__) && defined(__ALTIVEC__)
+    #define PPC_INTRINSICS
+#endif
 
 // This assumes that the idDrawVert array that is used in DeriveUnsmoothedTangents is aligned. If its not aligned,
 // then we don't get any speedup
diff --git a/neo/sys/osx/DOOMController.mm b/neo/sys/osx/DOOMController.mm
index 7335633f..530bda2f 100644
--- a/neo/sys/osx/DOOMController.mm
+++ b/neo/sys/osx/DOOMController.mm
@@ -254,7 +254,7 @@ returns in megabytes
 ================
 */
 int Sys_GetSystemRam( void ) {
-	long ramSize;
+	SInt32 ramSize;
 
 	if ( Gestalt( gestaltPhysicalRAMSize, &ramSize ) == noErr ) {
 		return ramSize / (1024*1024);
@@ -265,7 +265,7 @@ int Sys_GetSystemRam( void ) {
 
 bool OSX_GetCPUIdentification( int& cpuId, bool& oldArchitecture )
 {
-	long cpu;
+	SInt32 cpu;
 	Gestalt(gestaltNativeCPUtype, &cpu);
 
 	cpuId = cpu;