diff --git a/cs.c b/cs.c
index c2bd9003a3..c6fa5f9db8 100644
--- a/cs.c
+++ b/cs.c
@@ -709,6 +709,8 @@ cs_err CAPSTONE_API cs_option(csh ud, cs_opt_type type, size_t value)
 		case CS_OPT_SKIPDATA_SETUP:
 			if (value)
 				handle->skipdata_setup = *((cs_opt_skipdata *)value);
+				if (handle->skipdata_setup.mnemonic == NULL)
+					handle->skipdata_setup.mnemonic = SKIPDATA_MNEM;
 			return CS_ERR_OK;
 
 		case CS_OPT_MNEMONIC: