diff --git a/config.h.in b/config.h.in
index af2e5fc..f4d97a2 100644
--- a/config.h.in
+++ b/config.h.in
@@ -50,10 +50,6 @@
 /* Define to 1 if you have the <locale.h> header file. */
 #undef HAVE_LOCALE_H
 
-/* Define to 1 if your system has a GNU libc compatible `malloc' function, and
-   to 0 otherwise. */
-#undef HAVE_MALLOC
-
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
@@ -134,9 +130,6 @@
    */
 #undef LT_OBJDIR
 
-/* Define to 1 if your C compiler doesn't accept -c and -o together. */
-#undef NO_MINUS_C_MINUS_O
-
 /* Name of package */
 #undef PACKAGE
 
@@ -167,9 +160,6 @@
 /* Define to empty if `const' does not conform to ANSI C. */
 #undef const
 
-/* Define to rpl_malloc if the replacement function should be used. */
-#undef malloc
-
 /* Define to rpl_realloc if the replacement function should be used. */
 #undef realloc
 
diff --git a/configure.ac b/configure.ac
index ba6d77f..4dd4ee6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,7 +43,6 @@ AC_TYPE_SIZE_T
 # Checks for library functions.
 AC_FUNC_VPRINTF
 AC_FUNC_MEMCMP
-AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 AC_CHECK_FUNCS(strcasecmp strdup strerror snprintf vsnprintf vasprintf open vsyslog strncasecmp setlocale)
 AC_CHECK_DECLS([INFINITY], [], [], [[#include <math.h>]])