diff --git a/src/Makefile.am b/src/Makefile.am
index 9499000..725ac41 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -42,6 +42,7 @@ resid-fp/wave.cc
 
 if CPU_I386
 pcem_SOURCES += codegen_x86.c
+pcem_CFLAGS += -msse2
 endif
 
 if CPU_X86_64
diff --git a/src/vid_voodoo_codegen_x86.h b/src/vid_voodoo_codegen_x86.h
index 83d0d00..f02c0bc 100644
--- a/src/vid_voodoo_codegen_x86.h
+++ b/src/vid_voodoo_codegen_x86.h
@@ -3685,7 +3685,7 @@ static void voodoo_codegen_init(voodoo_t *voodoo)
 
 #ifdef __linux__
 	start = (void *)((long)voodoo->codegen_data & pagemask);
-	len = (sizeof(voodoo_x86_data_t) * BLOCK_NUM) + pagesize) & pagemask;
+	len = ((sizeof(voodoo_x86_data_t) * BLOCK_NUM) + pagesize) & pagemask;
 	if (mprotect(start, len, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
 	{
 		perror("mprotect");