diff --git a/core/hw/sh4/modules/mmu.cpp b/core/hw/sh4/modules/mmu.cpp
index c8c6f55c0..1b0189cbc 100644
--- a/core/hw/sh4/modules/mmu.cpp
+++ b/core/hw/sh4/modules/mmu.cpp
@@ -78,7 +78,8 @@ defining NO_MMU disables the full mmu emulation
 
 #include "hw/mem/_vmem.h"
 
-u32 mmu_full_lookup(u32 va, u32& idx, u32& rv, bool internal = false);
+template<bool internal = false>
+u32 mmu_full_lookup(u32 va, u32& idx, u32& rv);
 
 //#define TRACE_WINCE_SYSCALLS
 
@@ -291,7 +292,8 @@ bool mmu_match(u32 va, CCN_PTEH_type Address, CCN_PTEL_type Data)
 	return false;
 }
 //Do a full lookup on the UTLB entry's
-u32 mmu_full_lookup(u32 va, u32& idx, u32& rv, bool internal)
+template<bool internal>
+u32 mmu_full_lookup(u32 va, u32& idx, u32& rv)
 {
 	if (!internal)
 	{
diff --git a/core/hw/sh4/modules/wince.h b/core/hw/sh4/modules/wince.h
index 45d0491c0..570b7d701 100644
--- a/core/hw/sh4/modules/wince.h
+++ b/core/hw/sh4/modules/wince.h
@@ -11,7 +11,7 @@ static bool read_mem32(u32 addr, u32& data)
 {
 	u32 pa;
 	u32 idx;
-	if (mmu_full_lookup(addr, idx, pa, true) != MMU_ERROR_NONE)
+	if (mmu_full_lookup<true>(addr, idx, pa) != MMU_ERROR_NONE)
 		return false;
 	data = ReadMem32_nommu(pa);
 	return true;
@@ -21,7 +21,7 @@ static bool read_mem16(u32 addr, u16& data)
 {
 	u32 pa;
 	u32 idx;
-	if (mmu_full_lookup(addr, idx, pa, true) != MMU_ERROR_NONE)
+	if (mmu_full_lookup<true>(addr, idx, pa) != MMU_ERROR_NONE)
 		return false;
 	data = ReadMem16_nommu(pa);
 	return true;
@@ -31,7 +31,7 @@ static bool read_mem8(u32 addr, u8& data)
 {
 	u32 pa;
 	u32 idx;
-	if (mmu_full_lookup(addr, idx, pa, true) != MMU_ERROR_NONE)
+	if (mmu_full_lookup<true>(addr, idx, pa) != MMU_ERROR_NONE)
 		return false;
 	data = ReadMem8_nommu(pa);
 	return true;