--- configure.ac	(Asterisk 13.21)
+++ configure.ac	(working copy)
@@ -1980,5 +1980,5 @@
 		else #looking in imap directory didn't work, try c-client
 			imap_ldflags=""
-			imap_libs="-lcrypto -lssl -lc-client"
+			imap_libs="-lcrypto -lssl -lc-client4"
 			imap_include="-DUSE_SYSTEM_CCLIENT"
 			CPPFLAGS="${saved_cppflags}"