diff --git a/include/instructions.h b/include/instructions.h
index aca20c7..8e9b337 100644
--- a/include/instructions.h
+++ b/include/instructions.h
@@ -26,5 +26,6 @@ public:
   void xor_rm32_r32();  // 0x31
   void nop();           // 0x90
   void mov_ecx_imm32(); // 0xb9
+  void mov_ebx_imm32(); // 0xbb
   void hlt();           // 0xf4
 };
diff --git a/instructions.cpp b/instructions.cpp
index abc537a..71278ee 100644
--- a/instructions.cpp
+++ b/instructions.cpp
@@ -23,6 +23,7 @@ void Instructions::init_instructions(){
   this->instructions[0x31] = &Instructions::xor_rm32_r32;
   this->instructions[0x90] = &Instructions::nop;
   this->instructions[0xb9] = &Instructions::mov_ecx_imm32;
+  this->instructions[0xbb] = &Instructions::mov_ebx_imm32;
   this->instructions[0xf4] = &Instructions::hlt;
 }
 
@@ -105,6 +106,15 @@ void Instructions::mov_ecx_imm32(){
   this->eip += 3;
 }
 
+void Instructions::mov_ebx_imm32(){
+  printf("mov_ebx_imm32 called.\n");
+
+  this->eip++;
+  uint32_t imm32 = memory.read_uint32(this->eip);
+  this->registers[3] = imm32;
+  this->eip += 3;
+}
+
 void Instructions::hlt(){
   printf("hlt called.\n");
   this->eip = 0x00;