diff --git a/font.c b/font.c
index 755727b3..37b2db6d 100644
--- a/font.c
+++ b/font.c
@@ -70,29 +70,29 @@ underline_strikeout_metrics(struct font *font)
     LOG_DBG("ft: y-scale: %f, height: %f, descent: %f",
             y_scale, height, descent);
 
-    font->underline.position = round(ft_face->underline_position * y_scale / 64.);
-    font->underline.thickness = ceil(ft_face->underline_thickness * y_scale / 64.);
+    font->underline.position = ft_face->underline_position * y_scale / 64.;
+    font->underline.thickness = ft_face->underline_thickness * y_scale / 64.;
 
     if (font->underline.position == 0.) {
-        font->underline.position =  round(descent / 2.);
-        font->underline.thickness =  fabs(round(descent / 5.));
+        font->underline.position = descent / 2.;
+        font->underline.thickness = descent / 5.;
     }
 
-    LOG_DBG("underline: pos=%d, thick=%d",
+    LOG_DBG("underline: pos=%f, thick=%f",
             font->underline.position, font->underline.thickness);
 
     TT_OS2 *os2 = FT_Get_Sfnt_Table(ft_face, ft_sfnt_os2);
     if (os2 != NULL) {
-        font->strikeout.position = round(os2->yStrikeoutPosition * y_scale / 64.);
-        font->strikeout.thickness = ceil(os2->yStrikeoutSize * y_scale / 64.);
+        font->strikeout.position = os2->yStrikeoutPosition * y_scale / 64.;
+        font->strikeout.thickness = os2->yStrikeoutSize * y_scale / 64.;
     }
 
     if (font->strikeout.position == 0.) {
-        font->strikeout.position = round(height / 2. + descent);
+        font->strikeout.position = height / 2. + descent;
         font->strikeout.thickness = font->underline.thickness;
     }
 
-    LOG_DBG("strikeout: pos=%d, thick=%d",
+    LOG_DBG("strikeout: pos=%f, thick=%f",
             font->strikeout.position, font->strikeout.thickness);
 }
 
diff --git a/font.h b/font.h
index a01416dc..1a94067a 100644
--- a/font.h
+++ b/font.h
@@ -53,13 +53,13 @@ struct font {
     int max_x_advance;
 
     struct {
-        int position;
-        int thickness;
+        double position;
+        double thickness;
     } underline;
 
     struct {
-        int position;
-        int thickness;
+        double position;
+        double thickness;
     } strikeout;
 
     bool is_fallback;
diff --git a/render.c b/render.c
index f74c5fac..b90b27e8 100644
--- a/render.c
+++ b/render.c
@@ -105,12 +105,13 @@ draw_underline(const struct terminal *term, pixman_image_t *pix,
                const pixman_color_t *color, int x, int y, int cols)
 {
     int baseline = y + font_baseline(term);
-    int width = font->underline.thickness;
-    int y_under = baseline - font->underline.position - width / 2;
+    double width = font->underline.thickness;
+    int y_under = floor(baseline - font->underline.position + width / 2.);
 
     pixman_image_fill_rectangles(
         PIXMAN_OP_SRC, pix, color,
-        1, &(pixman_rectangle16_t){x, y_under, cols * term->cell_width, width});
+        1, &(pixman_rectangle16_t){
+            x, y_under, cols * term->cell_width, round(max(1., width))});
 }
 
 static void
@@ -119,12 +120,13 @@ draw_strikeout(const struct terminal *term, pixman_image_t *pix,
                const pixman_color_t *color, int x, int y, int cols)
 {
     int baseline = y + font_baseline(term);
-    int width = font->strikeout.thickness;
-    int y_strike = baseline - font->strikeout.position - width / 2;
+    double width = font->strikeout.thickness;
+    int y_strike = floor(baseline - font->strikeout.position + width / 2.);
 
     pixman_image_fill_rectangles(
         PIXMAN_OP_SRC, pix, color,
-        1, &(pixman_rectangle16_t){x, y_strike, cols * term->cell_width, width});
+        1, &(pixman_rectangle16_t){
+            x, y_strike, cols * term->cell_width, round(max(1., width))});
 }
 
 static bool