diff --git a/import/OpenXDK/include/xboxkrnl/rtl.h b/import/OpenXDK/include/xboxkrnl/rtl.h
index 99dbdb512..b11c23d7e 100644
--- a/import/OpenXDK/include/xboxkrnl/rtl.h
+++ b/import/OpenXDK/include/xboxkrnl/rtl.h
@@ -168,7 +168,13 @@ XBSYSAPI EXPORTNUM(277) VOID NTAPI RtlEnterCriticalSection
   IN PRTL_CRITICAL_SECTION CriticalSection
 );
 
-XBSYSAPI VOID *RtlEnterCriticalSectionAndRegion;
+// ******************************************************************
+// * 0x0116 - RtlEnterCriticalSectionAndRegion()
+// ******************************************************************
+XBSYSAPI EXPORTNUM(278) VOID NTAPI RtlEnterCriticalSectionAndRegion
+(
+	IN PRTL_CRITICAL_SECTION CriticalSection
+);
 
 // ******************************************************************
 // * 0x0117 - RtlEqualString()
@@ -313,7 +319,13 @@ XBSYSAPI EXPORTNUM(294) VOID NTAPI RtlLeaveCriticalSection
   IN PRTL_CRITICAL_SECTION CriticalSection
 );
 
-XBSYSAPI VOID *RtlLeaveCriticalSectionAndRegion;
+// ******************************************************************
+// * 0x0127 - RtlLeaveCriticalSectionAndRegion()
+// ******************************************************************
+XBSYSAPI EXPORTNUM(295) VOID NTAPI RtlLeaveCriticalSectionAndRegion
+(
+	IN PRTL_CRITICAL_SECTION CriticalSection
+);
 
 // ******************************************************************
 // * RtlLowerChar
diff --git a/src/CxbxKrnl/EmuKrnlRtl.cpp b/src/CxbxKrnl/EmuKrnlRtl.cpp
index 1b9b172a8..8fa1db0ab 100644
--- a/src/CxbxKrnl/EmuKrnlRtl.cpp
+++ b/src/CxbxKrnl/EmuKrnlRtl.cpp
@@ -436,6 +436,21 @@ XBSYSAPI EXPORTNUM(277) xboxkrnl::VOID NTAPI xboxkrnl::RtlEnterCriticalSection
 	}
 }
 
+// ******************************************************************
+// * 0x0116 - RtlEnterCriticalSectionAndRegion()
+// ******************************************************************
+XBSYSAPI EXPORTNUM(278) xboxkrnl::VOID NTAPI xboxkrnl::RtlEnterCriticalSectionAndRegion
+(
+	IN PRTL_CRITICAL_SECTION CriticalSection
+)
+{
+	/** sorta pointless
+	LOG_FUNC_ONE_ARG(CriticalSection);
+	//*/
+
+	LOG_UNIMPLEMENTED();
+}
+
 // ******************************************************************
 // * 0x0117 - RtlEqualString()
 // ******************************************************************
@@ -753,6 +768,10 @@ XBSYSAPI EXPORTNUM(294) xboxkrnl::VOID NTAPI xboxkrnl::RtlLeaveCriticalSection
 		return;
 	}
 
+	/* sorta pointless
+	LOG_FUNC_ONE_ARG(CriticalSection);
+	//*/
+
 	int iSection = FindCriticalSection(CriticalSection);
 
 	if (iSection >= 0)
@@ -764,12 +783,24 @@ XBSYSAPI EXPORTNUM(294) xboxkrnl::VOID NTAPI xboxkrnl::RtlLeaveCriticalSection
 		CriticalSection->RecursionCount = GlobalCriticalSections[iSection].NativeCriticalSection.RecursionCount;
 		CriticalSection->OwningThread = GlobalCriticalSections[iSection].NativeCriticalSection.OwningThread;
 	}
+
 	// Note: We need to execute this before debug output to avoid trouble
 	//NtDll::RtlLeaveCriticalSection((NtDll::_RTL_CRITICAL_SECTION*)CriticalSection);
+}
 
-	/* sorta pointless
+// ******************************************************************
+// * 0x0127 - RtlLeaveCriticalSectionAndRegion()
+// ******************************************************************
+XBSYSAPI EXPORTNUM(295) xboxkrnl::VOID NTAPI xboxkrnl::RtlLeaveCriticalSectionAndRegion
+(
+	IN PRTL_CRITICAL_SECTION CriticalSection
+)
+{
+	/** sorta pointless
 	LOG_FUNC_ONE_ARG(CriticalSection);
 	//*/
+
+	LOG_UNIMPLEMENTED();
 }
 
 // ******************************************************************
diff --git a/src/CxbxKrnl/KernelThunk.cpp b/src/CxbxKrnl/KernelThunk.cpp
index 775714c46..26754590a 100644
--- a/src/CxbxKrnl/KernelThunk.cpp
+++ b/src/CxbxKrnl/KernelThunk.cpp
@@ -345,7 +345,7 @@ extern "C" CXBXKRNL_API uint32 CxbxKrnl_KernelThunkTable[379] =
 	(uint32)FUNC(&xboxkrnl::RtlDowncaseUnicodeChar),              // 0x0113 (275)
 	(uint32)FUNC(&xboxkrnl::RtlDowncaseUnicodeString),            // 0x0114 (276)
 	(uint32)FUNC(&xboxkrnl::RtlEnterCriticalSection),             // 0x0115 (277)
-	(uint32)PANIC(0x0116),                                        // 0x0116 (278) RtlEnterCriticalSectionAndRegion
+	(uint32)FUNC(&xboxkrnl::RtlEnterCriticalSectionAndRegion),    // 0x0116 (278)
 	(uint32)FUNC(&xboxkrnl::RtlEqualString),                      // 0x0117 (279)
 	(uint32)FUNC(&xboxkrnl::RtlEqualUnicodeString),               // 0x0118 (280)
 	(uint32)FUNC(&xboxkrnl::RtlExtendedIntegerMultiply),          // 0x0119 (281)
@@ -362,7 +362,7 @@ extern "C" CXBXKRNL_API uint32 CxbxKrnl_KernelThunkTable[379] =
 	(uint32)FUNC(&xboxkrnl::RtlIntegerToChar),                    // 0x0124 (292)
 	(uint32)FUNC(&xboxkrnl::RtlIntegerToUnicodeString),           // 0x0125 (293)
 	(uint32)FUNC(&xboxkrnl::RtlLeaveCriticalSection),             // 0x0126 (294)
-	(uint32)PANIC(0x0127),                                        // 0x0127 (295) RtlLeaveCriticalSectionAndRegion
+	(uint32)FUNC(&xboxkrnl::RtlLeaveCriticalSectionAndRegion),    // 0x0127 (295)
 	(uint32)FUNC(&xboxkrnl::RtlLowerChar),                        // 0x0128 (296)
 	(uint32)FUNC(&xboxkrnl::RtlMapGenericMask),                   // 0x0129 (297)
 	(uint32)FUNC(&xboxkrnl::RtlMoveMemory),                       // 0x012A (298)