diff --git a/xcode/drape/drape.xcodeproj/project.pbxproj b/xcode/drape/drape.xcodeproj/project.pbxproj
index ff750d7739..559538a9c3 100644
--- a/xcode/drape/drape.xcodeproj/project.pbxproj
+++ b/xcode/drape/drape.xcodeproj/project.pbxproj
@@ -740,6 +740,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 34AF87C91DBE4F4900E5E7DC /* common-debug.xcconfig */;
 			buildSettings = {
+				GCC_OPTIMIZATION_LEVEL = 2;
 				HEADER_SEARCH_PATHS = (
 					"$(inherited)",
 					"$(OMIM_ROOT)/3party/glm/",
diff --git a/xcode/drape_frontend/drape_frontend.xcodeproj/project.pbxproj b/xcode/drape_frontend/drape_frontend.xcodeproj/project.pbxproj
index defa14f29d..c4c08aa8f5 100644
--- a/xcode/drape_frontend/drape_frontend.xcodeproj/project.pbxproj
+++ b/xcode/drape_frontend/drape_frontend.xcodeproj/project.pbxproj
@@ -970,6 +970,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 34AF87CB1DBE508400E5E7DC /* common-debug.xcconfig */;
 			buildSettings = {
+				GCC_OPTIMIZATION_LEVEL = 2;
 				HEADER_SEARCH_PATHS = (
 					"$(OMIM_ROOT)",
 					"$(BOOST_ROOT)",