diff --git a/src/gmio_core/internal/string.h b/src/gmio_core/internal/string.h
index 105956f..185bc00 100644
--- a/src/gmio_core/internal/string.h
+++ b/src/gmio_core/internal/string.h
@@ -34,10 +34,9 @@
 
 #include <stddef.h>
 
-/*! Stores a mutable string of 8-bit chars.
+/*! Stores a mutable string of chars.
  *  For faster lookups, it knowns the length of its contents. Length must not
- *  exceeds the maximum size(capacity).
- */
+ *  exceeds the maximum size(capacity).  */
 struct gmio_string
 {
     char*  ptr; /*!< Contents */
@@ -103,9 +102,7 @@ char* gmio_cstr_copy(
         char* dst, size_t dst_capacity, const char* src, size_t src_len)
 {
     const size_t copy_len =
-            dst_capacity > 0 ?
-                GMIO_MIN(dst_capacity - 1, src_len) :
-                0;
+            dst_capacity > 0 ? GMIO_MIN(dst_capacity - 1, src_len) : 0;
     if (copy_len > 0) {
         strncpy(dst, src, copy_len);
         dst[copy_len] = '\0';
diff --git a/src/gmio_core/internal/zlib_utils.h b/src/gmio_core/internal/zlib_utils.h
index 41bb15d..40b142e 100644
--- a/src/gmio_core/internal/zlib_utils.h
+++ b/src/gmio_core/internal/zlib_utils.h
@@ -47,22 +47,20 @@ bool gmio_check_zlib_compress_options(
         int* error, const struct gmio_zlib_compress_options* z_opts);
 
 /*! Decompresses the source buffer into the destination buffer.
- *
- *  \p sourceLen is the byte length of the source buffer. Upon entry, \p destLen
+ *  \p src_len is the byte length of the source buffer. Upon entry, \p dest_len
  *  is the total size of the destination buffer, which must be large enough to
  *  hold the entire uncompressed data.
- *  Upon exit, destLen is the actual size of the compressed buffer.
- */
+ *  Upon exit, \p dest_len is the actual size of the compressed buffer. */
 int gmio_zlib_uncompress_buffer(
         uint8_t* dest, size_t* dest_len, const uint8_t* src, size_t src_len);
 
-/*! Computes the CRC-32 value with the bytes buff[0..buff_len-1] */
+/*! Computes the CRC-32 value with the bytes from \p buff */
 uint32_t gmio_zlib_crc32(const uint8_t* buff, size_t buff_len);
 
-/*! Returns the required initial value for the gmio_zlib_crc32_update() */
+/*! Returns the required initial value for gmio_zlib_crc32_update() */
 uint32_t gmio_zlib_crc32_initial();
 
-/*! Updates a running CRC-32 with the bytes buff[0..buff_len-1] */
+/*! Updates a running CRC-32 with the bytes from \p buff */
 uint32_t gmio_zlib_crc32_update(
         uint32_t crc, const uint8_t* buff, size_t buff_len);
 
diff --git a/src/gmio_core/zlib_compress.h b/src/gmio_core/zlib_compress.h
index 882dcb5..93e7af3 100644
--- a/src/gmio_core/zlib_compress.h
+++ b/src/gmio_core/zlib_compress.h
@@ -62,21 +62,14 @@ enum gmio_zlib_compress_strategy
  *
  *  Initialising gmio_zlib_compress_options with \c {0} (or \c {} in C++) is the
  *  convenient way to set default values.
- */
+*/
 struct gmio_zlib_compress_options
 {
-    /*! Compression level
-     *
-     *  \c 0 : default compression
-     *  \c 1 : best speed
-     *  \c 9 : best compression */
+    /*! Compression level.
+     *  Use enum value from \c gmio_zlib_compress_level */
     uint8_t level;
 
-    /*! Compression strategy
-     *
-     *  \c 0 : default strategy
-     *  \c 1 : filtered
-     *  \c 9 : best compression */
+    /*! Compression strategy */
     enum gmio_zlib_compress_strategy strategy;
 
     /*! Specifies how much memory should be allocated for the internal
@@ -86,8 +79,7 @@ struct gmio_zlib_compress_options
      *  default usage.
      *
      *  \c 1 uses minimum memory but is slow and reduces compression ratio
-     *  \c 9 uses maximum memory for optimal speed
-     */
+     *  \c 9 uses maximum memory for optimal speed */
     uint8_t memory_usage;
 };