diff --git a/drivers/dahdi/wctdm24xxp/base.c b/drivers/dahdi/wctdm24xxp/base.c
index 5a65cd3..ec32cb5 100644
--- a/drivers/dahdi/wctdm24xxp/base.c
+++ b/drivers/dahdi/wctdm24xxp/base.c
@@ -1886,6 +1886,7 @@ static void set_ring(struct wctdm *wc, struct fxo *fxo,
 static void wctdm_fxo_ring_detect(struct wctdm *wc, struct wctdm_module *mod)
 {
 	struct fxo *const fxo = &mod->mod.fxo;
+	const unsigned int NEEDED_POLARITY_CHANGES = 3;
 
 	/* Look for ring status bits (Ring Detect Signal Negative and Ring
 	 * Detect Signal Positive) to transition back and forth some number of
@@ -1898,7 +1899,8 @@ static void wctdm_fxo_ring_detect(struct wctdm *wc, struct wctdm_module *mod)
 	switch (fxo->ring_state) {
 	case DEBOUNCING_RINGING_POSITIVE:
 		if (is_fxo_ringing_negative(fxo)) {
-			if (++fxo->ring_polarity_change_count > 4) {
+			if (++fxo->ring_polarity_change_count >
+						NEEDED_POLARITY_CHANGES) {
 				mod_hooksig(wc, mod, DAHDI_RXSIG_RING);
 				set_ring(wc, fxo, RINGING);
 				if (debug) {
@@ -1916,7 +1918,8 @@ static void wctdm_fxo_ring_detect(struct wctdm *wc, struct wctdm_module *mod)
 		break;
 	case DEBOUNCING_RINGING_NEGATIVE:
 		if (is_fxo_ringing_positive(fxo)) {
-			if (++fxo->ring_polarity_change_count > 4) {
+			if (++fxo->ring_polarity_change_count >
+						NEEDED_POLARITY_CHANGES) {
 				mod_hooksig(wc, mod, DAHDI_RXSIG_RING);
 				set_ring(wc, fxo, RINGING);
 				if (debug) {