--- configure.ac	(Asterisk 13.20)
+++ configure.ac	(working copy)
@@ -1832,5 +1832,5 @@
 		LIBS="${saved_libs}"
 		imap_ldflags=""
-		imap_libs="-lc-client"
+		imap_libs="-lcrypto -lssl -lc-client"
 		imap_include="-DUSE_SYSTEM_IMAP" #Try the imap directory first
 		CPPFLAGS="${CPPFLAGS} ${imap_include}"