diff --git a/Transmission.xcodeproj/project.pbxproj b/Transmission.xcodeproj/project.pbxproj
index 68c20ec36..670cef364 100644
--- a/Transmission.xcodeproj/project.pbxproj
+++ b/Transmission.xcodeproj/project.pbxproj
@@ -2793,7 +2793,6 @@
 				COPY_PHASE_STRIP = NO;
 				DEAD_CODE_STRIPPING = NO;
 				DEBUG_INFORMATION_FORMAT = stabs;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = YES;
 				GCC_ENABLE_PASCAL_STRINGS = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = YES;
@@ -2913,7 +2912,6 @@
 				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = stabs;
 				DEPLOYMENT_POSTPROCESSING = YES;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = YES;
 				GCC_ENABLE_PASCAL_STRINGS = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = YES;
@@ -2971,7 +2969,6 @@
 				DEAD_CODE_STRIPPING = NO;
 				DEBUG_INFORMATION_FORMAT = stabs;
 				DEPLOYMENT_POSTPROCESSING = YES;
-				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = YES;
 				GCC_ENABLE_PASCAL_STRINGS = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = YES;