diff --git a/demos/modules/ginput/keyboard/main.c b/demos/modules/ginput/keyboard/main.c
index 12aa6585..d6a987b0 100644
--- a/demos/modules/ginput/keyboard/main.c
+++ b/demos/modules/ginput/keyboard/main.c
@@ -98,7 +98,7 @@ int main(void) {
 		if (pk->bytecount) {
 			gwinPrintf(GW, " Keys:");
 			for (i = 0; i < pk->bytecount; i++)
-				gwinPrintf(GW, " 0x%02X", (uint8_t)pk->c[i]);
+				gwinPrintf(GW, " 0x%02X", (int)(uint8_t)pk->c[i]);
 			gwinPrintf(GW, " [");
 			for (i = 0; i < pk->bytecount; i++)
 				gwinPrintf(GW, "%c", pk->c[i] >= ' ' && pk->c[i] <= '~' ? pk->c[i] : ' ');
diff --git a/demos/modules/gwin/keyboard/main.c b/demos/modules/gwin/keyboard/main.c
index 3d137b4e..29f5f519 100644
--- a/demos/modules/gwin/keyboard/main.c
+++ b/demos/modules/gwin/keyboard/main.c
@@ -121,7 +121,7 @@ int main(void) {
 			if (pk->bytecount) {
 				gwinPrintf(ghConsole, " Keys:");
 				for (i = 0; i < pk->bytecount; i++)
-					gwinPrintf(ghConsole, " 0x%02X", (uint8_t)pk->c[i]);
+					gwinPrintf(ghConsole, " 0x%02X", (int)(uint8_t)pk->c[i]);
 				gwinPrintf(ghConsole, " [");
 				for (i = 0; i < pk->bytecount; i++)
 					gwinPrintf(ghConsole, "%c", pk->c[i] >= ' ' && pk->c[i] <= '~' ? pk->c[i] : ' ');
diff --git a/demos/modules/gwin/textedit/main.c b/demos/modules/gwin/textedit/main.c
index 29b075cd..034d01aa 100644
--- a/demos/modules/gwin/textedit/main.c
+++ b/demos/modules/gwin/textedit/main.c
@@ -145,7 +145,7 @@ int main(void) {
 		if (pk->bytecount) {
 			gwinPrintf(ghConsole, " Keys:");
 			for (i = 0; i < pk->bytecount; i++)
-				gwinPrintf(ghConsole, " 0x%02X", (uint8_t)pk->c[i]);
+				gwinPrintf(ghConsole, " 0x%02X", (int)(uint8_t)pk->c[i]);
 			gwinPrintf(ghConsole, " [");
 			for (i = 0; i < pk->bytecount; i++)
 				gwinPrintf(ghConsole, "%c", pk->c[i] >= ' ' && pk->c[i] <= '~' ? pk->c[i] : ' ');