diff --git a/library/Makefile b/library/Makefile
index 2593147..7c62c1f 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -66,7 +66,7 @@ obj/%.o: src/%.c $(INCLUDES_SRC)
 clean:
 	rm -rf $(OBJECTS_OBJ) $(EXECUTABLE)
 
-install:
+install: $(EXECUTABLE)
 	install -m 0755 -d $(DESTDIR)$(includedir) $(DESTDIR)$(libdir)
 	install -m 0644 -t $(DESTDIR)$(includedir) zonedetect.h
 ifeq ($(OS),Windows_NT)
diff --git a/library/zonedetect.c b/library/zonedetect.c
index 6d3e352..6f800f4 100644
--- a/library/zonedetect.c
+++ b/library/zonedetect.c
@@ -700,7 +700,7 @@ static ZDLookupResult ZDPointInPolygon(const ZoneDetect *library, uint32_t polyg
 
                 /* Check if the target is on the border */
                 const int32_t intersectLon = (int32_t)(((float)latFixedPoint - b) / a);
-                if(intersectLon == lonFixedPoint) {
+                if(intersectLon >= lonFixedPoint-1 && intersectLon <= lonFixedPoint+1) {
                     if(distanceSqrMin) *distanceSqrMin = 0;
                     return ZD_LOOKUP_ON_BORDER_SEGMENT;
                 }