diff --git a/HexFiend/HFTextRepresenter.m b/HexFiend/HFTextRepresenter.m
index edc35154..276e0cb5 100644
--- a/HexFiend/HFTextRepresenter.m
+++ b/HexFiend/HFTextRepresenter.m
@@ -86,7 +86,7 @@
     HFASSERT(byteRange.length > 0);
     HFRange displayedRange = [self entireDisplayedRange];
     HFRange intersection = HFIntersectionRange(displayedRange, byteRange);
-    NSRect result;
+    NSRect result = {{0,},};
     if (intersection.length > 0) {
         NSRange intersectionNSRange = NSMakeRange(ll2l(intersection.location - displayedRange.location), ll2l(intersection.length));
         if (intersectionNSRange.length > 0) {
diff --git a/Makefile b/Makefile
index ffe52cc7..8b21e45a 100755
--- a/Makefile
+++ b/Makefile
@@ -46,8 +46,9 @@ LDFLAGS += -lc -lm
 endif
 
 ifeq ($(PLATFORM),Darwin)
+SYSROOT := $(shell xcodebuild -sdk macosx -version Path 2> /dev/null)
 CFLAGS += -F/Library/Frameworks
-OCFLAGS += -x objective-c -fobjc-arc -Wno-deprecated-declarations -isysroot $(shell xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -mmacosx-version-min=10.9
+OCFLAGS += -x objective-c -fobjc-arc -Wno-deprecated-declarations -isysroot $(SYSROOT) -mmacosx-version-min=10.9
 LDFLAGS += -framework AppKit -framework Carbon -framework QuartzCore
 SDL_LDFLAGS := -framework SDL
 endif