diff --git a/lib/malloc.h b/lib/malloc.h
new file mode 100644
index 0000000..3859c07
--- /dev/null
+++ b/lib/malloc.h
@@ -0,0 +1,3 @@
+#include <sys/types.h>
+
+void * rpl_malloc (size_t n);
diff --git a/lib/realloc.h b/lib/realloc.h
new file mode 100644
index 0000000..2163135
--- /dev/null
+++ b/lib/realloc.h
@@ -0,0 +1,3 @@
+#include <sys/types.h>
+
+void * rpl_realloc (void *p, size_t n);
diff --git a/src/config.h.in b/src/config.h.in
index 4756505..5397ee3 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -250,12 +250,14 @@
 #undef const
 
 /* Define to rpl_malloc if the replacement function should be used. */
+#include "rpl_malloc.h"
 #undef malloc
 
 /* Define to `int' if <sys/types.h> does not define. */
 #undef pid_t
 
 /* Define to rpl_realloc if the replacement function should be used. */
+#include "rpl_realloc.h"
 #undef realloc
 
 /* Define to `unsigned int' if <sys/types.h> does not define. */
diff --git a/src/rpl_malloc.h b/src/rpl_malloc.h
new file mode 120000
index 0000000..a8f17b5
--- /dev/null
+++ b/src/rpl_malloc.h
@@ -0,0 +1 @@
+../lib/malloc.h
\ No newline at end of file
diff --git a/src/rpl_realloc.h b/src/rpl_realloc.h
new file mode 120000
index 0000000..068e456
--- /dev/null
+++ b/src/rpl_realloc.h
@@ -0,0 +1 @@
+../lib/realloc.h
\ No newline at end of file