diff --git a/src/ctxt/theme.c b/src/ctxt/theme.c
index f449fb4..77c2387 100644
--- a/src/ctxt/theme.c
+++ b/src/ctxt/theme.c
@@ -1,6 +1,7 @@
 #include "theme.h"
 #include "../util.h"
 #include "../util/region.h"
+#include <inttypes.h>
 
 static const char* default_font_path(struct rgn* rgn)
 {
@@ -53,12 +54,18 @@ void ax__theme_set_font(
     enum ax_font_cat cat,
     const char* path, size_t size)
 {
+    const char** out_path;
     if (cat == AX_FONT__DEFAULT) {
-        thmb->dflt_font_path = rstrdup(thmb->rgn, path);
+        out_path = &thmb->dflt_font_path;
     } else {
         ASSERT(cat < AX_FONT__COUNT, "invalid font category");
         thmb->thm.font_size[cat] = size;
-        thmb->thm.font_path[cat] = rstrdup(thmb->rgn, path);
+        out_path = &thmb->thm.font_path[cat];
+    }
+    if (path == NULL) {
+        *out_path = NULL;
+    } else {
+        *out_path = rstrdup(thmb->rgn, path);
     }
 }
 
@@ -110,3 +117,23 @@ int ax__string_to_font_cat(const char* str, enum ax_font_cat* out_cat)
     }
     return 0;
 }
+
+void ax__debug_theme(struct ax_theme* thm)
+{
+    printf("=========\nTHEME INFO:\n");
+    for (size_t i = 0; i < AX_COLOR__COUNT; i++) {
+        enum ax_color_cat val = i;
+        const char* str;
+#include "../../_build/color.printer.inc"
+        printf("  color `%s': #%06" PRIx64 "\n",
+               str, thm->colors[i]);
+    }
+    printf("--------\n");
+    for (size_t i = 0; i < AX_FONT__COUNT; i++) {
+        enum ax_font_cat val = i;
+        const char* str;
+#include "../../_build/font.printer.inc"
+        printf("  font `%s': \"%s\", size %zu\n",
+               str, thm->font_path[i], thm->font_size[i]);
+    }
+}
diff --git a/src/ctxt/theme.h b/src/ctxt/theme.h
index 4dc237d..0a7fbc6 100644
--- a/src/ctxt/theme.h
+++ b/src/ctxt/theme.h
@@ -81,3 +81,7 @@ static inline const char* ax__theme_font(
     }
     return thm->font_path[i];
 }
+
+
+
+void ax__debug_theme(struct ax_theme* thm);
diff --git a/test/main.c b/test/main.c
index b348c61..07dffb8 100644
--- a/test/main.c
+++ b/test/main.c
@@ -1,6 +1,6 @@
 #include <stdio.h>
 #include "../src/ax.h"
-// #include "../src/ctxt.h"
+#include "../src/ctxt/theme.h"
 
 
 int main(void)
@@ -15,10 +15,15 @@ int main(void)
     if ((rv = ax_set_theme_font(ax, "default", "/usr/share/fonts/TTF/DejaVuSans.ttf", 0)) != 0) {
         goto cleanup;
     }
+    if ((rv = ax_set_theme_font(ax, "h1", NULL, 95)) != 0) {
+        goto cleanup;
+    }
 
     struct ax_theme* thm;
     ax_end_theme(ax, &thm);
-    ax_select_theme(ax, thm);
+
+    // ax_select_theme(ax, thm);
+    ax__debug_theme(thm);
 
 cleanup:
     if (rv != 0) {