diff --git a/Source/CxbxKrnl/EmuD3D8/VertexShader.cpp b/Source/CxbxKrnl/EmuD3D8/VertexShader.cpp
index eaad9aaf8..22a643fa1 100644
--- a/Source/CxbxKrnl/EmuD3D8/VertexShader.cpp
+++ b/Source/CxbxKrnl/EmuD3D8/VertexShader.cpp
@@ -436,7 +436,7 @@ static const char* OReg_Name[] =
     "a0.x"
 };
 
-static inline IsInUse(const boolean *pMask)
+static inline int IsInUse(const boolean *pMask)
 {
     return (pMask[0] || pMask[1] || pMask[2] || pMask[3]);
 }
@@ -473,10 +473,10 @@ static inline boolean HasILUO(VSH_SHADER_INSTRUCTION *pInstruction)
 }
 
 // Retrieves a number of bits in the instruction token
-static inline VshGetFromToken(uint32 *pShaderToken,
-                              uint08 SubToken,
-                              uint08 StartBit,
-                              uint08 BitLength)
+static inline int VshGetFromToken(uint32 *pShaderToken,
+                                  uint08 SubToken,
+                                  uint08 StartBit,
+                                  uint08 BitLength)
 {
     return (pShaderToken[SubToken] >> StartBit) & ~(0xFFFFFFFF << BitLength);
 }
diff --git a/Source/CxbxKrnl/EmuKrnl.cpp b/Source/CxbxKrnl/EmuKrnl.cpp
index c16b1a99c..4b2bcd8f2 100644
--- a/Source/CxbxKrnl/EmuKrnl.cpp
+++ b/Source/CxbxKrnl/EmuKrnl.cpp
@@ -41,6 +41,7 @@ namespace xboxkrnl
 };
 
 #include <stdio.h>
+#include <ctype.h>
 #include <locale.h>
 #include <process.h>
 
diff --git a/Source/CxbxKrnl/EmuXapi.cpp b/Source/CxbxKrnl/EmuXapi.cpp
index 495a9b49b..989935934 100644
--- a/Source/CxbxKrnl/EmuXapi.cpp
+++ b/Source/CxbxKrnl/EmuXapi.cpp
@@ -1183,7 +1183,7 @@ VOID WINAPI XTL::EmuXapiThreadStartup
 
     EmuSwapFS();   // XBox FS
 
-    typedef (__stdcall *pfDummyFunc)(DWORD dwDummy);
+    typedef int (__stdcall *pfDummyFunc)(DWORD dwDummy);
 
     pfDummyFunc func = (pfDummyFunc)dwDummy1;