diff --git a/src/parser.c b/src/parser.c
index 793bb68..74ac067 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -21,6 +21,7 @@ static const char *SINGLE_TRANSFER_OPCODES[] = {"ldr", "str"};
 static const char *WIDE_MOV_OPCODES[] = {"movn", "movz", "movz", "movk"};
 static const char *ARITHMETIC_OPCODES[] = {"add", "adds", "sub", "subs"};
 static const char *MULTIPLY_OPCODES[] = {"mul", "madd", "msub", "mneg"};
+static const char *SHIFT_TYPE_OPCODES[] = {"lsl", "lsr", "asr", "ror"};
 
 a64inst_instruction *parse(char **asmLines, int lineCount) {
     a64inst_instruction *instructions = malloc(sizeof(a64inst_instruction) * lineCount);
@@ -165,7 +166,14 @@ int getOperandNumber(char *operand){
     char operandCpy[strlen(operand)];
     strcpy(operandCpy, operand+1);
     char **endptr = NULL;
-    int number = strtol(operandCpy, endptr, 10);
+    int number;
+    if(strncmp(operandCpy, "0x", 2)==0){
+        //hex value
+        strcpy(operandCpy, operand+3);
+        number = strtol(operandCpy, endptr, 16);
+    } else {
+        number = strtol(operandCpy, endptr, 10);
+    }
     return number;
 }