diff --git a/preprocessor/DynareBison.yy b/preprocessor/DynareBison.yy
index 43204fc6d0a59939e76b2201d15cd3cd96e9161d..72c443658b396b7fbb813976625a95c25b066727 100644
--- a/preprocessor/DynareBison.yy
+++ b/preprocessor/DynareBison.yy
@@ -1763,7 +1763,7 @@ o_gsa_alpha2_stab : ALPHA2_STAB EQUAL non_negative_number { driver.option_num("a
 o_gsa_ksstat : KSSTAT EQUAL non_negative_number { driver.option_num("ksstat", $3); };
 o_gsa_logtrans_redform : LOGTRANS_REDFORM EQUAL INT_NUMBER { driver.option_num("logtrans_redform", $3); };
 o_gsa_threshold_redform : THRESHOLD_REDFORM EQUAL vec_value { driver.option_num("threshold_redform",$3); };
-o_gsa_ksstat_redform : KSSTAT_REDFORM EQUAL non_negative_number { driver.option_num("ksstat_redfrom", $3); };
+o_gsa_ksstat_redform : KSSTAT_REDFORM EQUAL non_negative_number { driver.option_num("ksstat_redform", $3); };
 o_gsa_alpha2_redform : ALPHA2_REDFORM EQUAL non_negative_number { driver.option_num("alpha2_redform", $3); };
 o_gsa_namendo : NAMENDO EQUAL '(' symbol_list_ext ')' { driver.option_symbol_list("namendo"); };
 o_gsa_namlagendo : NAMLAGENDO EQUAL '(' symbol_list_ext ')' { driver.option_symbol_list("namlagendo"); };