diff --git a/src/insn.c b/src/insn.c
index b02fd95..868d7c7 100644
--- a/src/insn.c
+++ b/src/insn.c
@@ -34,6 +34,7 @@ void insn_execute(cpu_t *cpu, uint32_t insn) {
         }
 
         secondary_insn_handler[op2](cpu, insn);
+        return;
     }
 
     if (op > TABLE_SIZE || primary_insn_handler[op] == NULL) {