diff --git a/src/lib-sieve/plugins/variables/ext-variables-common.c b/src/lib-sieve/plugins/variables/ext-variables-common.c
index 17cba74351ac6af8bc8c18cc7bc400c5a7ba1916..1d8b66a2645217d194f012f49537ef9a111e9a30 100644
--- a/src/lib-sieve/plugins/variables/ext-variables-common.c
+++ b/src/lib-sieve/plugins/variables/ext-variables-common.c
@@ -39,6 +39,15 @@ sieve_variables_get_max_scope_size(const struct sieve_extension *var_ext)
 	return config->max_scope_size;
 }
 
+size_t
+sieve_variables_get_max_variable_size(const struct sieve_extension *var_ext)
+{
+	const struct ext_variables_config *config =
+		ext_variables_get_config(var_ext);
+
+	return config->max_variable_size;
+}
+
 /*
  * Extension configuration
  */
diff --git a/src/lib-sieve/plugins/variables/sieve-ext-variables.h b/src/lib-sieve/plugins/variables/sieve-ext-variables.h
index 5b2796d2b6f1e48480bd14b12321e9a24f0d1077..937eefbbf685f30a7c697bbd24ef6539c4ae16ea 100644
--- a/src/lib-sieve/plugins/variables/sieve-ext-variables.h
+++ b/src/lib-sieve/plugins/variables/sieve-ext-variables.h
@@ -17,6 +17,8 @@
 
 unsigned int
 sieve_variables_get_max_scope_size(const struct sieve_extension *var_ext);
+size_t
+sieve_variables_get_max_variable_size(const struct sieve_extension *var_ext);
 
 /*
  * Variable extension