diff --git a/src/codegen/fasm.rs b/src/codegen/fasm.rs
index 01b14b5..a682f50 100644
--- a/src/codegen/fasm.rs
+++ b/src/codegen/fasm.rs
@@ -77,6 +77,8 @@ impl FasmCodegen {
 			},
 			// If the operator is division.
 			MathOperator::OP_DIV  => {
+			    asm_start.push_str("\tpop r10\n");
+			    asm_start.push_str("\tpop r11\n");
 			    asm_start.push_str("\tmov rax, r10\n");
 			    asm_start.push_str("\txor rdx, rdx\n");
 			    asm_start.push_str("\tidiv r11\n");
@@ -85,6 +87,8 @@ impl FasmCodegen {
 			},
 			// If the operators is subtraction.
 			MathOperator::OP_SUB  => {
+			    asm_start.push_str("\tpop r10\n");
+			    asm_start.push_str("\tpop r11\n");
 			    asm_start.push_str("\tsub r10, r11\n");
 			    asm_start.push_str("\tmov rax, r10\n");
 
@@ -93,6 +97,8 @@ impl FasmCodegen {
 			},
 			// If the operator is modulo.
 			MathOperator::OP_MOD  => {
+			    asm_start.push_str("\tpop r10\n");
+			    asm_start.push_str("\tpop r11\n");
 			    asm_start.push_str("\tmov rax, r10\n");
 			    asm_start.push_str("\txor rdx, rdx\n");
 			    asm_start.push_str("\tidiv r11\n");