diff --git a/include/mbedtls/cmac.h b/include/mbedtls/cmac.h
index d94c015..f64ae69 100644
--- a/include/mbedtls/cmac.h
+++ b/include/mbedtls/cmac.h
@@ -48,7 +48,7 @@
     /** Internal state of the CMAC algorithm  */
     unsigned char       state[MBEDTLS_CIPHER_BLKSIZE_MAX];
 
-    /** Unprocessed data - either data that was not block aligned and is still 
+    /** Unprocessed data - either data that was not block aligned and is still
      *  pending to be processed, or the final block */
     unsigned char       unprocessed_block[MBEDTLS_CIPHER_BLKSIZE_MAX];