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