diff --git a/OpenRCT2.xcodeproj/project.pbxproj b/OpenRCT2.xcodeproj/project.pbxproj
index e093ee144f..d9147e6075 100644
--- a/OpenRCT2.xcodeproj/project.pbxproj
+++ b/OpenRCT2.xcodeproj/project.pbxproj
@@ -124,6 +124,7 @@
 		C650B21A1CCABBDD00B4D91C /* tables.cpp in Sources */ = {isa = PBXBuildFile; fileRef = C650B2171CCABBDD00B4D91C /* tables.cpp */; };
 		C650B21C1CCABC4400B4D91C /* ConvertCommand.cpp in Sources */ = {isa = PBXBuildFile; fileRef = C650B21B1CCABC4400B4D91C /* ConvertCommand.cpp */; };
 		C6575A371D46AFBA00C3E79F /* debug_paint.c in Sources */ = {isa = PBXBuildFile; fileRef = C6575A361D46AFBA00C3E79F /* debug_paint.c */; };
+		C6834A111DFDE8E300CE933A /* interop.c in Sources */ = {isa = PBXBuildFile; fileRef = C6834A0F1DFDE8E300CE933A /* interop.c */; };
 		C686F8AC1CDBC37E009F9BFC /* banner.c in Sources */ = {isa = PBXBuildFile; fileRef = C686F8981CDBC37E009F9BFC /* banner.c */; };
 		C686F8AD1CDBC37E009F9BFC /* entrance.c in Sources */ = {isa = PBXBuildFile; fileRef = C686F8991CDBC37E009F9BFC /* entrance.c */; };
 		C686F8AE1CDBC37E009F9BFC /* fence.c in Sources */ = {isa = PBXBuildFile; fileRef = C686F89A1CDBC37E009F9BFC /* fence.c */; };
@@ -544,6 +545,8 @@
 		C650B2181CCABBDD00B4D91C /* Tables.h */ = {isa = PBXFileReference; explicitFileType = sourcecode.cpp.h; fileEncoding = 4; path = Tables.h; sourceTree = "<group>"; usesTabs = 0; };
 		C650B21B1CCABC4400B4D91C /* ConvertCommand.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = ConvertCommand.cpp; sourceTree = "<group>"; usesTabs = 0; };
 		C6575A361D46AFBA00C3E79F /* debug_paint.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = debug_paint.c; sourceTree = "<group>"; };
+		C6834A0F1DFDE8E300CE933A /* interop.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = interop.c; sourceTree = "<group>"; usesTabs = 1; };
+		C6834A101DFDE8E300CE933A /* interop.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = interop.h; sourceTree = "<group>"; };
 		C686F8981CDBC37E009F9BFC /* banner.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = banner.c; sourceTree = "<group>"; };
 		C686F8991CDBC37E009F9BFC /* entrance.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = entrance.c; sourceTree = "<group>"; };
 		C686F89A1CDBC37E009F9BFC /* fence.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = fence.c; sourceTree = "<group>"; };
@@ -1409,6 +1412,8 @@
 		C6B5A7CF1CDFE4CB00C9C006 /* rct2 */ = {
 			isa = PBXGroup;
 			children = (
+				C6834A0F1DFDE8E300CE933A /* interop.c */,
+				C6834A101DFDE8E300CE933A /* interop.h */,
 				C6B5A7D01CDFE4CB00C9C006 /* S6Exporter.cpp */,
 				C6B5A7D11CDFE4CB00C9C006 /* S6Exporter.h */,
 				C6B5A7D21CDFE4CB00C9C006 /* S6Importer.cpp */,
@@ -2842,6 +2847,7 @@
 				C686F90E1CDBC3B7009F9BFC /* corkscrew_roller_coaster.c in Sources */,
 				D44272A61CC81B3200D84D28 /* scenery.c in Sources */,
 				C686F9111CDBC3B7009F9BFC /* heartline_twister_coaster.c in Sources */,
+				C6834A111DFDE8E300CE933A /* interop.c in Sources */,
 				C686F9231CDBC3B7009F9BFC /* steeplechase.c in Sources */,
 				D44271FE1CC81B3200D84D28 /* config.c in Sources */,
 				D44272871CC81B3200D84D28 /* staff_list.c in Sources */,