diff --git a/src/Assembler.c b/src/Assembler.c
index 9adbcc8..9ccbeb5 100644
--- a/src/Assembler.c
+++ b/src/Assembler.c
@@ -412,7 +412,7 @@ int AsCall(int Register, int FuncID) {
     fprintf(OutputFile, "\tcall\t%s\n", Symbols[FuncID].Name);
     fprintf(OutputFile, "\tmovq\t%%rax, %s\n", Registers[OutRegister]);
     
-    DeallocateRegister(OutRegister);
+    DeallocateRegister(Register);
     return OutRegister;
 }