diff --git a/configure.ac b/configure.ac
index 0134179e9..0af3a85ed 100644
--- a/configure.ac
+++ b/configure.ac
@@ -844,6 +844,7 @@ RB_CHK_SYSHEADER(valgrind/callgrind.h, [VALGRIND_CALLGRIND_H])
 dnl experimental
 RB_CHK_SYSHEADER(experimental/string_view, [EXPERIMENTAL_STRING_VIEW])
 RB_CHK_SYSHEADER(experimental/optional, [EXPERIMENTAL_OPTIONAL])
+RB_CHK_SYSHEADER(experimental/memory_resource, [EXPERIMENTAL_MEMORY_RESOURCE])
 
 dnl
 dnl Specific function checks