diff --git a/src/examples/sample-plugin/Makefile.am b/src/examples/sample-plugin/Makefile.am
index 2622f4e..1825a8f 100644
--- a/src/examples/sample-plugin/Makefile.am
+++ b/src/examples/sample-plugin/Makefile.am
@@ -13,7 +13,7 @@
 
 AUTOMAKE_OPTIONS = foreign subdir-objects
 
-AM_CFLAGS = -Wall -I${top_srcdir} -I${top_builddir} @DLMALLOC@
+AM_CFLAGS = -Wall -I${top_srcdir} -I${top_builddir}
 AM_LDFLAGS = -module -shared -avoid-version
 AM_LIBTOOLFLAGS = --quiet
 SUFFIXES = .api.h .api .api.json
diff --git a/src/examples/sample-plugin/configure.ac b/src/examples/sample-plugin/configure.ac
index 57ec6ee..69d9891 100644
--- a/src/examples/sample-plugin/configure.ac
+++ b/src/examples/sample-plugin/configure.ac
@@ -32,9 +32,6 @@
   m4_append([list_of_enabled], [$1], [, ])
 ])
 
-ENABLE_ARG(dlmalloc,    [Enable dlmalloc])
-AC_SUBST(DLMALLOC,              [-DUSE_DLMALLOC=${n_enable_dlmalloc}])
-
 CC_CHECK_FLAG("-Wno-address-of-packed-member")
 AS_IF([test "$cc_flag_check" = yes],
 	[CFLAGS="${CFLAGS} -Wno-address-of-packed-member"], [])