diff --git a/synfig-core/src/config.h.cmake.in b/synfig-core/src/config.h.cmake.in
index 31034b6..d7ad47f 100644
--- a/synfig-core/src/config.h.cmake.in
+++ b/synfig-core/src/config.h.cmake.in
@@ -3,14 +3,14 @@
 #cmakedefine HAVE_LIBPTHREAD
 
 // header files
-#cmakedefine01 HAVE_SYS_WAIT_H
-#cmakedefine01 HAVE_SIGNAL_H
-#cmakedefine01 HAVE_TERMIOS_H
-#cmakedefine01 HAVE_PROCESS_H
-#cmakedefine01 HAVE_IO_H
-#cmakedefine01 HAVE_FCNTL_H
+#cmakedefine HAVE_SYS_WAIT_H 1
+#cmakedefine HAVE_SIGNAL_H 1
+#cmakedefine HAVE_TERMIOS_H 1
+#cmakedefine HAVE_PROCESS_H 1
+#cmakedefine HAVE_IO_H 1
+#cmakedefine HAVE_FCNTL_H 1
 
 // defines needed for piped processes
-#cmakedefine HAVE_FORK
-#cmakedefine HAVE_PIPE
-#cmakedefine HAVE_WAITPID
+#cmakedefine HAVE_FORK 1
+#cmakedefine HAVE_PIPE 1
+#cmakedefine HAVE_WAITPID 1
diff --git a/synfig-core/src/synfig/CMakeLists.txt b/synfig-core/src/synfig/CMakeLists.txt
index 617c212..17b05c9 100644
--- a/synfig-core/src/synfig/CMakeLists.txt
+++ b/synfig-core/src/synfig/CMakeLists.txt
@@ -132,6 +132,8 @@ target_link_libraries(synfig
 
         # TODO: properly detect ltdl
         ltdl
+    PRIVATE
+        dl # TODO: Remove dlerror from module.cpp and this library too
 )
 
 ## Install headers