diff --git a/ide/Xcode4/FLTK.xcodeproj/project.pbxproj b/ide/Xcode4/FLTK.xcodeproj/project.pbxproj
index af801dcab..aea7c81f5 100644
--- a/ide/Xcode4/FLTK.xcodeproj/project.pbxproj
+++ b/ide/Xcode4/FLTK.xcodeproj/project.pbxproj
@@ -11024,10 +11024,7 @@
 				GCC_MODEL_TUNING = G5;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = fltk.pch;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					FL_LIBRARY,
-					"FLTK_ABI_VERSION=10399",
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = FL_LIBRARY;
 				HEADER_SEARCH_PATHS = (
 					../../ide/XCode3/,
 					../../,
@@ -12576,10 +12573,7 @@
 				GCC_MODEL_TUNING = G5;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = fltk.pch;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					FL_LIBRARY,
-					"FLTK_ABI_VERSION=10399",
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = FL_LIBRARY;
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				HEADER_SEARCH_PATHS = (
 					../../ide/XCode3/,
@@ -13021,10 +13015,7 @@
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = fltk.pch;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					FL_LIBRARY,
-					"FLTK_ABI_VERSION=10399",
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = FL_LIBRARY;
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				HEADER_SEARCH_PATHS = (
 					../../ide/XCode3/,
@@ -14024,10 +14015,7 @@
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = fltk.pch;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					FL_LIBRARY,
-					"FLTK_ABI_VERSION=10399",
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = FL_LIBRARY;
 				HEADER_SEARCH_PATHS = (
 					../../ide/XCode3/,
 					../../,
@@ -14709,10 +14697,7 @@
 				GCC_MODEL_TUNING = G5;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = fltk.pch;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					FL_LIBRARY,
-					"FLTK_ABI_VERSION=10399",
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = FL_LIBRARY;
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				HEADER_SEARCH_PATHS = (
 					../../ide/XCode3/,
@@ -15683,10 +15668,7 @@
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = fltk.pch;
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					FL_LIBRARY,
-					"FLTK_ABI_VERSION=10399",
-				);
+				GCC_PREPROCESSOR_DEFINITIONS = FL_LIBRARY;
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				HEADER_SEARCH_PATHS = (
 					../../ide/XCode3/,