diff --git a/Makefile b/Makefile
index c75d101..e44d664 100644
--- a/Makefile
+++ b/Makefile
@@ -38,7 +38,7 @@ ADIF_RPATH = -Wl,-rpath,$(adif_lib)
 
 PKG_VER_MAJOR = 2
 PKG_VER_MINOR = 1
-PKG_VER_RELEASE = 4
+PKG_VER_RELEASE = 6
 PKG_VER = $(PKG_VER_MAJOR).$(PKG_VER_MINOR).$(PKG_VER_RELEASE)
 
 PKG_VERSO_LIB = $(PKG_SO_LIB).$(PKG_VER)
@@ -75,7 +75,7 @@ endif
 #################################################################
 # Macro definition check
 
-ifeq ($(shell test -e /usr/include/sys/epoll.h && echo 1), 1)
+ifeq ($(shell test -e /usr/include/sys/epoll.hh && echo 1), 1)
   DEFS += -DHAVE_EPOLL
 else
   DEFS += -DHAVE_SELECT