diff --git a/dlls/dwrite/font.c b/dlls/dwrite/font.c
index 2ff3b8c1b67..d466612cacd 100644
--- a/dlls/dwrite/font.c
+++ b/dlls/dwrite/font.c
@@ -1927,11 +1927,11 @@ static HRESULT fontfamily_add_font(struct dwrite_fontfamily_data *family_data, s
     family_data->fonts[family_data->font_count] = font_data;
     family_data->font_count++;
     if (font_data->style == DWRITE_FONT_STYLE_NORMAL)
-        family_data->has_normal_face = TRUE;
+        family_data->has_normal_face = 1;
     else if (font_data->style == DWRITE_FONT_STYLE_OBLIQUE)
-        family_data->has_oblique_face = TRUE;
+        family_data->has_oblique_face = 1;
     else
-        family_data->has_italic_face = TRUE;
+        family_data->has_italic_face = 1;
     return S_OK;
 }
 
@@ -2733,8 +2733,8 @@ static HRESULT init_font_data(IDWriteFactory2 *factory, IDWriteFontFile *file, D
     data->face_index = face_index;
     data->face_type = face_type;
     data->simulations = DWRITE_FONT_SIMULATIONS_NONE;
-    data->bold_sim_tested = FALSE;
-    data->oblique_sim_tested = FALSE;
+    data->bold_sim_tested = 0;
+    data->oblique_sim_tested = 0;
     IDWriteFontFile_AddRef(file);
     IDWriteFactory2_AddRef(factory);
 
@@ -2811,9 +2811,9 @@ static HRESULT init_fontfamily_data(IDWriteLocalizedStrings *familyname, struct
     data->ref = 1;
     data->font_count = 0;
     data->font_alloc = 2;
-    data->has_normal_face = FALSE;
-    data->has_oblique_face = FALSE;
-    data->has_italic_face = FALSE;
+    data->has_normal_face = 0;
+    data->has_oblique_face = 0;
+    data->has_italic_face = 0;
 
     data->fonts = heap_alloc(sizeof(*data->fonts)*data->font_alloc);
     if (!data->fonts) {
@@ -2839,7 +2839,7 @@ static void fontfamily_add_bold_simulated_face(struct dwrite_fontfamily_data *fa
         if (family->fonts[i]->bold_sim_tested)
             continue;
 
-        family->fonts[i]->bold_sim_tested = TRUE;
+        family->fonts[i]->bold_sim_tested = 1;
         for (j = i; j < family->font_count; j++) {
             if (family->fonts[j]->bold_sim_tested)
                 continue;
@@ -2850,7 +2850,7 @@ static void fontfamily_add_bold_simulated_face(struct dwrite_fontfamily_data *fa
                     weight = family->fonts[j]->weight;
                     heaviest = j;
                 }
-                family->fonts[j]->bold_sim_tested = TRUE;
+                family->fonts[j]->bold_sim_tested = 1;
             }
         }
 
@@ -2892,7 +2892,7 @@ static void fontfamily_add_bold_simulated_face(struct dwrite_fontfamily_data *fa
             strcatW(facenameW, boldW);
 
             if (init_font_data_from_font(family->fonts[heaviest], DWRITE_FONT_SIMULATIONS_BOLD, facenameW, &boldface) == S_OK) {
-                boldface->bold_sim_tested = TRUE;
+                boldface->bold_sim_tested = 1;
                 fontfamily_add_font(family, boldface);
             }
         }
@@ -2911,7 +2911,7 @@ static void fontfamily_add_oblique_simulated_face(struct dwrite_fontfamily_data
         if (family->fonts[i]->oblique_sim_tested)
             continue;
 
-        family->fonts[i]->oblique_sim_tested = TRUE;
+        family->fonts[i]->oblique_sim_tested = 1;
         if (family->fonts[i]->style == DWRITE_FONT_STYLE_NORMAL)
             regular = i;
         else if (family->fonts[i]->style == DWRITE_FONT_STYLE_OBLIQUE)
@@ -2925,7 +2925,7 @@ static void fontfamily_add_oblique_simulated_face(struct dwrite_fontfamily_data
             if ((family->fonts[i]->weight == family->fonts[j]->weight) &&
                 (family->fonts[i]->stretch == family->fonts[j]->stretch)) {
 
-                family->fonts[j]->oblique_sim_tested = TRUE;
+                family->fonts[j]->oblique_sim_tested = 1;
                 if (regular == ~0 && family->fonts[j]->style == DWRITE_FONT_STYLE_NORMAL)
                     regular = j;
 
@@ -2956,7 +2956,7 @@ static void fontfamily_add_oblique_simulated_face(struct dwrite_fontfamily_data
         strcatW(facenameW, obliqueW);
 
         if (init_font_data_from_font(family->fonts[regular], DWRITE_FONT_SIMULATIONS_OBLIQUE, facenameW, &obliqueface) == S_OK) {
-            obliqueface->oblique_sim_tested = TRUE;
+            obliqueface->oblique_sim_tested = 1;
             fontfamily_add_font(family, obliqueface);
         }
     }
diff --git a/dlls/dwrite/layout.c b/dlls/dwrite/layout.c
index 7345f78efbd..d281243ad51 100644
--- a/dlls/dwrite/layout.c
+++ b/dlls/dwrite/layout.c
@@ -568,8 +568,8 @@ static HRESULT layout_update_breakpoints_range(struct dwrite_textlayout *layout,
             layout->actual_breakpoints[i].breakConditionAfter = DWRITE_BREAK_CONDITION_MAY_NOT_BREAK;
         }
 
-        layout->actual_breakpoints[i].isWhitespace = FALSE;
-        layout->actual_breakpoints[i].isSoftHyphen = FALSE;
+        layout->actual_breakpoints[i].isWhitespace = 0;
+        layout->actual_breakpoints[i].isSoftHyphen = 0;
     }
 
     return S_OK;
@@ -797,11 +797,11 @@ static HRESULT layout_compute_runs(struct dwrite_textlayout *layout)
 
             metrics->width = 0.0f;
             metrics->length = r->u.object.length;
-            metrics->canWrapLineAfter = FALSE;
-            metrics->isWhitespace = FALSE;
-            metrics->isNewline = FALSE;
-            metrics->isSoftHyphen = FALSE;
-            metrics->isRightToLeft = FALSE;
+            metrics->canWrapLineAfter = 0;
+            metrics->isWhitespace = 0;
+            metrics->isNewline = 0;
+            metrics->isSoftHyphen = 0;
+            metrics->isRightToLeft = 0;
             metrics->padding = 0;
             c->run = r;
             c->position = 0; /* there's always one cluster per inline object, so 0 is valid value */
@@ -931,7 +931,7 @@ static HRESULT layout_compute_runs(struct dwrite_textlayout *layout)
     if (hr == S_OK) {
         layout->cluster_count = cluster;
         if (cluster)
-            layout->clustermetrics[cluster-1].canWrapLineAfter = TRUE;
+            layout->clustermetrics[cluster-1].canWrapLineAfter = 1;
     }
 
     IDWriteTextAnalyzer_Release(analyzer);