diff --git a/AltStore.xcodeproj/project.pbxproj b/AltStore.xcodeproj/project.pbxproj
index 62c58e11..fab481a5 100644
--- a/AltStore.xcodeproj/project.pbxproj
+++ b/AltStore.xcodeproj/project.pbxproj
@@ -2653,6 +2653,7 @@
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos macosx";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SYSTEM_HEADER_SEARCH_PATHS = "\"$(SRCROOT)/Dependencies/AltSign/Dependencies\"";
 			};
 			name = Debug;
 		};
@@ -2708,6 +2709,7 @@
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos macosx";
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				SYSTEM_HEADER_SEARCH_PATHS = "\"$(SRCROOT)/Dependencies/AltSign/Dependencies\"";
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;