diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index de84cd2..ff160e2 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,8 +1,9 @@
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-set(SOURCES "main.c" "logfile.c" "log.c" "matches.c" "ipaddr.c" "filelist.c" "regexps_posix.c" "config.c" "jail.c")
+set(SOURCES "main.c" "logfile.c" "log.c" "matches.c" "ipaddr.c" "filelist.c" "regexps_posix.c" "config.c" "jail.c" "backend.c")
 
 add_executable(f2b ${SOURCES})
+target_link_libraries(f2b "dl")
 
 install(TARGETS f2b
         RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
diff --git a/src/common.h b/src/common.h
index 740818b..b5a01be 100644
--- a/src/common.h
+++ b/src/common.h
@@ -4,6 +4,7 @@
 #include <alloca.h>
 #include <assert.h>
 #include <ctype.h>
+#include <dlfcn.h>
 #include <errno.h>
 #include <limits.h>
 #include <stdio.h>
diff --git a/src/main.c b/src/main.c
index eaec358..e042100 100644
--- a/src/main.c
+++ b/src/main.c
@@ -4,6 +4,7 @@
 #include "regexps.h"
 #include "config.h"
 #include "jail.h"
+#include "backend.h"
 
 int main() {
     printf("Hello world!\n");