Fix missing word in ChangeLog entry for gmtime()
@@ -13,8 +13,8 @@ API Changes
Bugfix
* Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if
MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890
- * Fix build failures on where only gmtime() is available but neither
- gmtime_r() nor gmtime_s() are present. Fixes #1907.
+ * Fix build failures on platforms where only gmtime() is available but
+ neither gmtime_r() nor gmtime_s() are present. Fixes #1907.
= mbed TLS 2.12.0 branch released 2018-07-25
