1 files changed, 2 insertions, 2 deletions

diff --git a/editors/diff.c b/editors/diff.c
index cf14b1d03..e0adcee59 100644
--- a/editors/diff.c
+++ b/editors/diff.c
@@ -658,8 +658,8 @@ static bool diff(FILE* fp[2], char *file[2])
                                 }
 
                                 for (j = 0; j < 2; j++)
-                                        for (k = v[j].a; k < v[j].b; k++)
-                                                nonempty |= (ix[j][k+1] - ix[j][k] != 1);
+                                        for (k = v[j].a; k <= v[j].b; k++)
+                                                nonempty |= (ix[j][k] - ix[j][k - 1] != 1);
 
                                 vec = xrealloc_vector(vec, 6, ++idx);
                                 memcpy(vec[idx], v, sizeof(v));