2 files changed, 5 insertions, 1 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 3e5d5c3d587..b8b04b129ea 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2010-04-08  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
+
+        * frame.h (FRAME_LINE_TO_PIXEL_Y): Add missing parenthesis.
+
 2010-04-07  Jan Djärv  <jan.h.d@swipnet.se>
 
         * frame.h (FRAME_TEXT_LINES_TO_PIXEL_HEIGHT): Don't use
diff --git a/src/frame.h b/src/frame.h
index 36b0b6b069c..887d47eff21 100644
--- a/src/frame.h
+++ b/src/frame.h
@@ -980,7 +980,7 @@ extern Lisp_Object selected_frame;
    at ROW/COL.  */
 
 #define FRAME_LINE_TO_PIXEL_Y(f, row) \
-  ((row < FRAME_TOP_MARGIN (f) ? 0 : FRAME_INTERNAL_BORDER_WIDTH (f))   \
+  (((row) < FRAME_TOP_MARGIN (f) ? 0 : FRAME_INTERNAL_BORDER_WIDTH (f)) \
    + (row) * FRAME_LINE_HEIGHT (f))
 
 #define FRAME_COL_TO_PIXEL_X(f, col) \