diff --git a/m-core.h b/m-core.h
index ae24057a..3243dc64 100644
--- a/m-core.h
+++ b/m-core.h
@@ -2628,6 +2628,11 @@ m_core_parse2_enum (const char str[], const char **endptr)
 #define M_IF_METHOD2(method1, method2, oplist)				\
   M_IF(M_AND(M_TEST_METHOD_P(method1, oplist), M_TEST_METHOD_P(method2, oplist)))
 
+/* Perform a preprocessing M_IF if at least one method exists in the oplist.
+   Example: M_IF_AT_LEAST_METHOD(HASH, CMP, oplist) (define function with HASH or CMP method, ) */
+#define M_IF_AT_LEAST_METHOD(method1, method2, oplist)				\
+  M_IF(M_OR(M_TEST_METHOD_P(method1, oplist), M_TEST_METHOD_P(method2, oplist)))
+
 /* Perform a preprocessing M_IF if both methods exists in both oplist.
    Example: M_IF_METHOD2_BOTH(HASH, INIT, oplist1, oplist2) (define function with HASH & INIT method, ) */
 #define M_IF_METHOD2_BOTH(method1, method2, oplist1, oplist2)            \