diff --git a/sqlcipher.xcodeproj/project.pbxproj b/sqlcipher.xcodeproj/project.pbxproj
index 3e4722f8..c5ddd019 100644
--- a/sqlcipher.xcodeproj/project.pbxproj
+++ b/sqlcipher.xcodeproj/project.pbxproj
@@ -228,13 +228,14 @@
 		1DEB91F008733DB70010E9CD /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				ONLY_ACTIVE_ARCH = NO;
 				PREBINDING = NO;
+				SDKROOT = "$(PLATFORM_NAME)";
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "iphonesimulator macosx iphoneos";
 				VALID_ARCHS = "i386 ppc ppc64 ppc7400 ppc970 x86_64 armv6 armv7";
@@ -244,12 +245,13 @@
 		1DEB91F108733DB70010E9CD /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				ONLY_ACTIVE_ARCH = NO;
 				PREBINDING = NO;
+				SDKROOT = "$(PLATFORM_NAME)";
 				SKIP_INSTALL = YES;
 				SUPPORTED_PLATFORMS = "iphonesimulator macosx iphoneos";
 				VALID_ARCHS = "i386 ppc ppc64 ppc7400 ppc970 x86_64 armv6 armv7";