diff --git a/main/gbx/gbx_c_process.c b/main/gbx/gbx_c_process.c
index 074944675..fe5d31f86 100644
--- a/main/gbx/gbx_c_process.c
+++ b/main/gbx/gbx_c_process.c
@@ -263,8 +263,10 @@ static void init_child_tty(int fd)
 	tcgetattr(fd, &terminal);
 	
 	terminal.c_iflag |= ICRNL | IXON | IXOFF;
+	#ifdef IUTF8
 	if (LOCAL_is_UTF8) 
 		terminal.c_iflag |= IUTF8;
+	#endif
 	
 	terminal.c_oflag |= OPOST;
 	
diff --git a/main/gbx/gbx_math.c b/main/gbx/gbx_math.c
index e45686eb0..ebc64def6 100644
--- a/main/gbx/gbx_math.c
+++ b/main/gbx/gbx_math.c
@@ -212,7 +212,7 @@ double exp2(double x)
 
 #endif
 
-#if defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(ARCH_ARM)
+#if defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(ARCH_ARM) || defined(OS_CYGWIN)
 
 long double log10l(long double x)
 {