diff --git a/ablib.py b/ablib.py
index 7058a15..7749dff 100644
--- a/ablib.py
+++ b/ablib.py
@@ -1018,11 +1018,13 @@ def wait_edge(self,fd,callback,debouncingtime):
 		po.register(fd,select.EPOLLET)
 		while True:
 			events = po.poll()
+			po.unregister(fd)
 			timestamp=time.time()
 			if (timestamp-timestampprec>debouncingtime) and counter>0:
 				callback()
 			counter=counter+1
 			timestampprec=timestamp
+			po.register(fd,select.EPOLLET)
 
 	def set_edge(self,value,callback,debouncingtime=0):
 		if self.fd!=None:
@@ -1128,9 +1130,11 @@ def wait_edge(self,fd,callback):
 		po.register(fd,select.EPOLLET)
 		while True:
 			events = po.poll()
+			po.unregister(fd)
 			if counter>0:	
 				callback()
 			counter=counter+1
+			po.register(fd,select.EPOLLET)
 
 	def set_edge(self,value,callback):
 		if self.fd!=None:
@@ -1810,9 +1814,11 @@ def wait_edge(self,fd,callback):
 		po.register(fd,select.EPOLLET)
 		while True:
 			events = po.poll()
+			po.unregister(fd)
 			if counter>0:	
 				callback()
 			counter=counter+1
+			po.register(fd,select.EPOLLET)
 
 	def set_edge(self,value,callback):
 		if self.fd!=None:
@@ -2147,9 +2153,11 @@ def wait_edge(self,fd,callback):
 		po.register(fd,select.EPOLLET)
 		while True:
 			events = po.poll()
+			po.unregister(fd)
 			if counter>0:	
 				callback()
 			counter=counter+1
+			po.register(fd,select.EPOLLET)
 
 	def set_edge(self,value,callback):
 		if self.fd!=None: