diff --git a/Core/FileSystems/ISOFileSystem.cpp b/Core/FileSystems/ISOFileSystem.cpp
index 63e44b8e7b..4856e20f04 100644
--- a/Core/FileSystems/ISOFileSystem.cpp
+++ b/Core/FileSystems/ISOFileSystem.cpp
@@ -554,8 +554,7 @@ size_t ISOFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size, int &usec)
 		{
 			positionOnIso = e.sectorStart * 2048 + e.seekPos;
 			
-			if (e.seekPos + size > e.openSize)
-			{
+			if ((s64)e.seekPos + size > (s64)e.openSize) {
 				size = e.openSize - e.seekPos;
 			}
 		}
@@ -564,8 +563,7 @@ size_t ISOFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size, int &usec)
 			_dbg_assert_msg_(FILESYS, e.file != 0, "Expecting non-raw fd to have a tree entry.");
 
 			//clamp read length
-			if ((s64)e.seekPos > e.file->size - (s64)size)
-			{
+			if ((s64)e.seekPos + size > e.file->size) {
 				size = e.file->size - (s64)e.seekPos;
 			}