diff --git a/library/common.h b/library/common.h
index d740c7338c..780ce378de 100644
--- a/library/common.h
+++ b/library/common.h
@@ -70,7 +70,7 @@ extern void (*mbedtls_test_hook_test_fail)( const char * test, int line, const c
 
 /** Byte Reading Macros
  *
- * Given a multi-byte integer \p x, MBEDTLS_BYTE_n retrieves the n-th 
+ * Given a multi-byte integer \p x, MBEDTLS_BYTE_n retrieves the n-th
  * byte from x, where byte 0 is the least significant byte.
  */
 #define MBEDTLS_BYTE_0( x ) ( (uint8_t) (   ( x )         & 0xff ) )