diff --git a/Include/Aurora/Threading/Primitives/SOOPrimitives.hpp b/Include/Aurora/Threading/Primitives/SOOPrimitives.hpp
index 1ee2c7a0..0c3dfb31 100644
--- a/Include/Aurora/Threading/Primitives/SOOPrimitives.hpp
+++ b/Include/Aurora/Threading/Primitives/SOOPrimitives.hpp
@@ -43,13 +43,14 @@ namespace Aurora::Threading::Primitives
     static const auto kPrimitiveSize64LinuxCond      = 32;
     static const auto kPrimitiveSize64LinuxCondMutex = 16;
 
-    static const auto kPrimitiveSize32LinuxMutex     = 8;
+    // TODO: These values aren't quite correct yet:
+    static const auto kPrimitiveSize32LinuxMutex     = 12;
     static const auto kPrimitiveSize32LinuxSemaphore = 8;
     static const auto kPrimitiveSize32LinuxCS        = 40;
-    static const auto kPrimitiveSize32LinuxEvent     = 64;
+    static const auto kPrimitiveSize32LinuxEvent     = 40;
     static const auto kPrimitiveSize32LinuxRWLock    = 88;
     static const auto kPrimitiveSize32LinuxCond      = 32;
-    static const auto kPrimitiveSize32LinuxCondMutex = 16;
+    static const auto kPrimitiveSize32LinuxCondMutex = 12;
 
     // TODO: Other platforms...