diff --git a/source/devoptab/devoptab_fsa_read.cpp b/source/devoptab/devoptab_fsa_read.cpp
index 0fb4ff5..a122c80 100644
--- a/source/devoptab/devoptab_fsa_read.cpp
+++ b/source/devoptab/devoptab_fsa_read.cpp
@@ -64,6 +64,7 @@ ssize_t __fsa_read(struct _reent *r, void *fd, char *ptr, size_t len) {
             memcpy(ptr, alignedBuffer, status);
         }
 
+        file->offset += status;
         bytesRead += status;
         ptr += status;
 
@@ -74,4 +75,4 @@ ssize_t __fsa_read(struct _reent *r, void *fd, char *ptr, size_t len) {
     }
 
     return bytesRead;
-}
\ No newline at end of file
+}