diff --git a/src/screen.c b/src/screen.c
index 05639c3..d2227a8 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -4391,6 +4391,9 @@
 		int pi;
 		int bcol = (int)(ptr - line);
 
+		if (n_extra > 0)
+		    --bcol;  // still working on the previous char, e.g. Tab
+
 		// Check if any active property ends.
 		for (pi = 0; pi < text_props_active; ++pi)
 		{