diff --git a/driver_gl.cpp b/driver_gl.cpp
index f163878a844..eb0cefd1acc 100644
--- a/driver_gl.cpp
+++ b/driver_gl.cpp
@@ -719,7 +719,7 @@ void DriverGL::drawRectangle(PrimitiveObject *primitive) {
 	if (primitive->isFilled()) {
 		glBegin(GL_QUADS);
 	} else {
-		glBegin(GL_LINES);
+		glBegin(GL_LINE_LOOP);
 	}
 
 	glVertex2f(x1, y1);
diff --git a/driver_tinygl.cpp b/driver_tinygl.cpp
index b9419ffbbe4..3ff51fb58f7 100644
--- a/driver_tinygl.cpp
+++ b/driver_tinygl.cpp
@@ -505,22 +505,22 @@ void DriverTinyGL::drawRectangle(PrimitiveObject *primitive) {
 	uint16 c = ((color.red() & 0xF8) << 8) | ((color.green() & 0xFC) << 3) | (color.blue() >> 3);
 
 	if (primitive->isFilled()) {
-		for (; y1 < y2; y1++) {
-			for (int x = x1; x < x2; x++) {
+		for (; y1 <= y2; y1++) {
+			for (int x = x1; x <= x2; x++) {
 				WRITE_LE_UINT16(dst + 640 * y1 + x, c);
 			}
 		}
 	} else {
-		for (int x = x1; x < x2; x++) {
+		for (int x = x1; x <= x2; x++) {
 			WRITE_LE_UINT16(dst + 640 * y1 + x, c);
 		}
-		for (int x = x1; x < x2; x++) {
+		for (int x = x1; x <= x2; x++) {
 			WRITE_LE_UINT16(dst + 640 * y2 + x, c);
 		}
-		for (int y = y1; y < y2; y++) {
+		for (int y = y1; y <= y2; y++) {
 			WRITE_LE_UINT16(dst + 640 * y + x1, c);
 		}
-		for (int y = y1; y < y2; y++) {
+		for (int y = y1; y <= y2; y++) {
 			WRITE_LE_UINT16(dst + 640 * y + x2, c);
 		}
 	}