diff --git a/ff_ioman.c b/ff_ioman.c
index a2d7b1c..b0662f7 100644
--- a/ff_ioman.c
+++ b/ff_ioman.c
@@ -419,7 +419,7 @@ FF_Buffer_t * FF_GetBuffer( FF_IOManager_t * pxIOManager,
             if( ( ucMode == FF_MODE_READ ) && ( pxMatchingBuffer->ucMode == FF_MODE_READ ) )
             {
                 pxMatchingBuffer->usNumHandles += 1;
-                pxMatchingBuffer->usPersistance += 1;
+                pxMatchingBuffer->usPersistence += 1;
                 break;
             }
 
@@ -435,7 +435,7 @@ FF_Buffer_t * FF_GetBuffer( FF_IOManager_t * pxIOManager,
                 }
 
                 pxMatchingBuffer->usNumHandles = 1;
-                pxMatchingBuffer->usPersistance += 1;
+                pxMatchingBuffer->usPersistence += 1;
                 break;
             }
 
@@ -459,7 +459,7 @@ FF_Buffer_t * FF_GetBuffer( FF_IOManager_t * pxIOManager,
 
                 if( ( pxRLUBuffer == NULL ) ||
                     ( pxBuffer->ulLRU > pxRLUBuffer->ulLRU ) ||
-                    ( ( pxBuffer->ulLRU == pxRLUBuffer->ulLRU ) && ( pxBuffer->usPersistance > pxRLUBuffer->usPersistance ) ) )
+                    ( ( pxBuffer->ulLRU == pxRLUBuffer->ulLRU ) && ( pxBuffer->usPersistence > pxRLUBuffer->usPersistence ) ) )
                 {
                     pxRLUBuffer = pxBuffer;
                 }
@@ -497,7 +497,7 @@ FF_Buffer_t * FF_GetBuffer( FF_IOManager_t * pxIOManager,
                 }
 
                 pxRLUBuffer->ucMode = ( ucMode & FF_MODE_RD_WR );
-                pxRLUBuffer->usPersistance = 1;
+                pxRLUBuffer->usPersistence = 1;
                 pxRLUBuffer->ulLRU = 0;
                 pxRLUBuffer->usNumHandles = 1;
                 pxRLUBuffer->ulSector = ulSector;
diff --git a/include/ff_ioman.h b/include/ff_ioman.h
index 103b279..b324d87 100644
--- a/include/ff_ioman.h
+++ b/include/ff_ioman.h
@@ -213,7 +213,7 @@
                  bModified : 1, /* If the sector was modified since read. */
                  bValid : 1;    /* Initially FALSE. */
         uint16_t usNumHandles;  /* Number of objects using this buffer. */
-        uint16_t usPersistance; /* For the persistance algorithm. */
+        uint16_t usPersistence; /* For the persistence algorithm. */
     } FF_Buffer_t;
 
     typedef struct