diff --git a/xcode/defaults.xcconfig b/xcode/defaults.xcconfig
index 05ebb1b104..c044a2e4bd 100644
--- a/xcode/defaults.xcconfig
+++ b/xcode/defaults.xcconfig
@@ -7,3 +7,5 @@ BOOST_ROOT=$(OMIM_ROOT)/3party/boost
 HEADER_SEARCH_PATHS=$(OMIM_ROOT) $(BOOST_ROOT)
 
 IPHONEOS_DEPLOYMENT_TARGET=7.0
+
+GCC_PREPROCESSOR_DEFINITIONS[config=Release] = RELEASE=1 $(inherited)