diff --git a/src/core/psxmem.cc b/src/core/psxmem.cc
index 7b81a5833..9474cd24d 100644
--- a/src/core/psxmem.cc
+++ b/src/core/psxmem.cc
@@ -935,18 +935,6 @@ uint32_t PCSX::Memory::msanRealloc(uint32_t ptr, uint32_t size) {
     return newPtr + c_msanStart;
 }
 
-bool PCSX::Memory::msanValidateWrite(uint32_t addr, uint32_t size) {
-    uint32_t msanAddr = addr - c_msanStart;
-    if (!(m_msanUsableBitmap[msanAddr / 8] & (1 << msanAddr % 8))) {
-        return false;
-    }
-    for (uint32_t checkAddr = msanAddr; checkAddr < msanAddr + size; checkAddr++) {
-        m_msanWrittenBitmap[checkAddr / 8] |= 1 << checkAddr % 8;
-    }
-    [[likely]];
-    return true;
-}
-
 uint32_t PCSX::Memory::msanSetChainPtr(uint32_t headerAddr, uint32_t nextPtr, uint32_t wordCount) {
     if (!inMsanRange(headerAddr)) {
         headerAddr &= 0xffffff;
diff --git a/src/core/psxmem.h b/src/core/psxmem.h
index 8b5b09e99..204bd09e5 100644
--- a/src/core/psxmem.h
+++ b/src/core/psxmem.h
@@ -90,9 +90,11 @@ class Memory {
     uint32_t msanRealloc(uint32_t ptr, uint32_t size);
     uint32_t msanSetChainPtr(uint32_t headerAddr, uint32_t ptrToNext, uint32_t size);
     uint32_t msanGetChainPtr(uint32_t addr) const;
+
     inline MsanStatus msanGetStatus(uint32_t addr, uint32_t size) const {
         uint32_t msanAddr = addr - c_msanStart;
         if (!(m_msanUsableBitmap[msanAddr / 8] & (1 << msanAddr % 8))) {
+            [[unlikely]];
             return MsanStatus::UNUSABLE;
         }
         for (uint32_t checkAddr = msanAddr; checkAddr < msanAddr + size; checkAddr++) {
@@ -102,7 +104,18 @@ class Memory {
         }
         return MsanStatus::OK;
     }
-	bool msanValidateWrite(uint32_t addr, uint32_t size);
+
+	inline bool msanValidateWrite(uint32_t addr, uint32_t size) {
+        uint32_t msanAddr = addr - c_msanStart;
+        if (!(m_msanUsableBitmap[msanAddr / 8] & (1 << msanAddr % 8))) {
+            [[unlikely]];
+            return false;
+        }
+        for (uint32_t checkAddr = msanAddr; checkAddr < msanAddr + size; checkAddr++) {
+            m_msanWrittenBitmap[checkAddr / 8] |= 1 << checkAddr % 8;
+        }
+        return true;
+    }
 
     static inline bool inMsanRange(uint32_t addr) {
         return addr >= c_msanStart && addr < c_msanEnd;