diff --git a/src/screenshot.cpp b/src/screenshot.cpp
--- a/src/screenshot.cpp
+++ b/src/screenshot.cpp
@@ -708,7 +708,7 @@ static bool MakeSmallScreenshot(bool cra
 /**
  * Configure a ViewPort for rendering (a part of) the map into a screenshot.
  * @param t Screenshot type
- * @param [out] vp Result viewport
+ * @param[out] vp Result viewport
  */
 void SetupScreenshotViewport(ScreenshotType t, ViewPort *vp)
 {
@@ -764,7 +764,7 @@ static bool MakeLargeWorldScreenshot(Scr
 /**
  * Callback for generating a heightmap. Supports 8bpp grayscale only.
  * @param userdata Pointer to user data.
- * @param buf      Destination buffer.
+ * @param buffer   Destination buffer.
  * @param y        Line number of the first line to write.
  * @param pitch    Number of pixels to write (1 byte for 8bpp, 4 bytes for 32bpp). @see Colour
  * @param n        Number of lines to write.