diff --git a/masm/parse_mips32.c b/masm/parse_mips32.c
index bd07ce0..032f115 100644
--- a/masm/parse_mips32.c
+++ b/masm/parse_mips32.c
@@ -44,6 +44,8 @@ enum mips32_parse_format {
         MIPS32_PARSE_S,
         // shift variable: rd, rt, rs
         MIPS32_PARSE_SV,
+        // none:
+        MIPS32_PARSE_NONE,
 };
 
 #define FORMAT(ins, format) \
@@ -112,6 +114,7 @@ const enum mips32_parse_format mips32_parse_formats[] = {
 	FORMAT(SRAV, SV)
 	FORMAT(SRL, S)
 	FORMAT(SRLV, SV)
+        FORMAT(SYSCALL, NONE)
         FORMAT(OR, R)
         FORMAT(ORI, I)
         FORMAT(NOR, R)
@@ -665,6 +668,9 @@ static int parse_instruction(struct parser *parser,
         case MIPS32_PARSE_SV:
                 res = parse_instruction_sv(parser, &ins->mips32);
                 break;
+        case MIPS32_PARSE_NONE:
+                res = M_SUCCESS;
+                break;
         }
 
         if (res == M_SUCCESS && assert_eol(parser))