diff --git a/src/emu.cpp b/src/emu.cpp
index a5cdcb2..549a1c4 100644
--- a/src/emu.cpp
+++ b/src/emu.cpp
@@ -24,7 +24,7 @@ void Emu::addProcessingUnit(ProcessingUnit* processing_unit)
 	m_processing_units.push_back(processing_unit);
 }
 
-void Emu::addMemorySpace(const char* name, int size)
+void Emu::addMemorySpace(const char* name, uint32_t size)
 {
 	std::vector<uint8_t> memory(size);
 	m_memory_spaces.emplace(name, memory);
diff --git a/src/emu.h b/src/emu.h
index 8a48da0..a6d6076 100644
--- a/src/emu.h
+++ b/src/emu.h
@@ -16,7 +16,7 @@ public:
 	void update();
 
 	void addProcessingUnit(ProcessingUnit* processing_unit);
-	void addMemorySpace(const char* name, int size);
+	void addMemorySpace(const char* name, uint32_t size);
 
 	void writeMemory(const char* memory_space, uint32_t location, uint8_t value);