diff --git a/Source/Core/Core/IOS/SDIO/SDIOSlot0.cpp b/Source/Core/Core/IOS/SDIO/SDIOSlot0.cpp
index 7b13e6df6b..a832c66b38 100644
--- a/Source/Core/Core/IOS/SDIO/SDIOSlot0.cpp
+++ b/Source/Core/Core/IOS/SDIO/SDIOSlot0.cpp
@@ -503,7 +503,7 @@ u32 SDIOSlot0::GetOCRegister() const
   return ocr;
 }
 
-std::array<u32, 4> SDIOSlot0::GetCSDv1()
+std::array<u32, 4> SDIOSlot0::GetCSDv1() const
 {
   u64 size = m_card.GetSize();
 
@@ -585,7 +585,7 @@ std::array<u32, 4> SDIOSlot0::GetCSDv1()
   }};
 }
 
-std::array<u32, 4> SDIOSlot0::GetCSDv2()
+std::array<u32, 4> SDIOSlot0::GetCSDv2() const
 {
   const u64 size = m_card.GetSize();
 
diff --git a/Source/Core/Core/IOS/SDIO/SDIOSlot0.h b/Source/Core/Core/IOS/SDIO/SDIOSlot0.h
index 6f0f0255c6..ee6e3115e0 100644
--- a/Source/Core/Core/IOS/SDIO/SDIOSlot0.h
+++ b/Source/Core/Core/IOS/SDIO/SDIOSlot0.h
@@ -145,8 +145,8 @@ private:
 
   u32 GetOCRegister() const;
 
-  std::array<u32, 4> GetCSDv1();
-  std::array<u32, 4> GetCSDv2();
+  std::array<u32, 4> GetCSDv1() const;
+  std::array<u32, 4> GetCSDv2() const;
   void InitSDHC();
 
   u64 GetAddressFromRequest(u32 arg) const;