1 files changed, 7 insertions, 3 deletions

diff --git a/src/intervals.h b/src/intervals.h
index f6c1c002ce0..d7c34012e1f 100644
--- a/src/intervals.h
+++ b/src/intervals.h
@@ -161,8 +161,13 @@ struct interval
    (INTERVAL_HAS_PARENT (i) ? INTERVAL_PARENT (i) : 0)
 
 /* Abort if interval I's size is negative.  */
-#define CHECK_TOTAL_LENGTH(i) \
-  if ((int) (i)->total_length < 0) abort (); else
+#define CHECK_TOTAL_LENGTH(i)          \
+  do                                   \
+    {                                  \
+      if ((int) (i)->total_length < 0) \
+        abort ();                      \
+    }                                  \
+  while (0)
 
 /* Reset this interval to its vanilla, or no-property state. */
 #define RESET_INTERVAL(i) \
@@ -339,4 +344,3 @@ extern Lisp_Object get_pos_property (Lisp_Object pos, Lisp_Object prop,
 extern void syms_of_textprop (void);
 
 #include "composite.h"
-