diff --git a/src/ints/int10_char.cpp b/src/ints/int10_char.cpp
index 45dfee71..f6153b30 100644
--- a/src/ints/int10_char.cpp
+++ b/src/ints/int10_char.cpp
@@ -58,7 +58,7 @@ static void TANDY16_CopyRow(Bit8u cleft,Bit8u cright,Bit8u rold,Bit8u rnew,PhysP
 	PhysPt dest=base+((CurMode->twidth*rnew)*(cheight/banks)+cleft)*4;
 	PhysPt src=base+((CurMode->twidth*rold)*(cheight/banks)+cleft)*4;
 	Bitu copy=(cright-cleft)*4;Bitu nextline=CurMode->twidth*4;
-	for (Bitu i=0;i<cheight/banks;i++) {
+	for (Bitu i=0;i<static_cast<Bitu>(cheight/banks);i++) {
 		for (Bitu b=0;b<banks;b++) MEM_BlockCopy(dest+b*8*1024,src+b*8*1024,copy);
 		dest+=nextline;src+=nextline;
 	}
@@ -140,7 +140,7 @@ static void TANDY16_FillRow(Bit8u cleft,Bit8u cright,Bit8u row,PhysPt base,Bit8u
 	PhysPt dest=base+((CurMode->twidth*row)*(cheight/banks)+cleft)*4;
 	Bitu copy=(cright-cleft)*4;Bitu nextline=CurMode->twidth*4;
 	attr=(attr & 0xf) | (attr & 0xf) << 4;
-	for (Bitu i=0;i<cheight/banks;i++) {
+	for (Bitu i=0;i<static_cast<Bitu>(cheight/banks);i++) {
 		for (Bitu x=0;x<copy;x++) {
 			for (Bitu b=0;b<banks;b++) mem_writeb(dest+b*8*1024+x,attr);
 		}