diff --git a/particles/string.c b/particles/string.c
index dd6deb7..b7f389a 100644
--- a/particles/string.c
+++ b/particles/string.c
@@ -146,7 +146,7 @@ instantiate(const struct particle *particle, const struct tag_set *tags)
         sbuf_strncat(&formatted, src, begin - src);
 
         /* Copy tag value */
-        const char *value = tag->value(tag);
+        const char *value = tag->as_string(tag);
         sbuf_strcat(&formatted, value);
 
         /* Skip past tag name + closing '}' */
diff --git a/tag.c b/tag.c
index 0d35a7f..2864d73 100644
--- a/tag.c
+++ b/tag.c
@@ -38,7 +38,7 @@ destroy_string(struct tag *tag)
 }
 
 static const char *
-value_int(const struct tag *tag)
+int_as_string(const struct tag *tag)
 {
     static char as_string[128];
     const struct private *priv = tag->private;
@@ -48,14 +48,14 @@ value_int(const struct tag *tag)
 }
 
 static const char *
-value_bool(const struct tag *tag)
+bool_as_string(const struct tag *tag)
 {
     const struct private *priv = tag->private;
     return priv->value_as_bool ? "true" : "false";
 }
 
 static const char *
-value_float(const struct tag *tag)
+float_as_string(const struct tag *tag)
 {
     static char as_string[128];
     const struct private *priv = tag->private;
@@ -65,7 +65,7 @@ value_float(const struct tag *tag)
 }
 
 static const char *
-value_string(const struct tag *tag)
+string_as_string(const struct tag *tag)
 {
     const struct private *priv = tag->private;
     return priv->value_as_string;
@@ -82,7 +82,7 @@ tag_new_int(const char *name, long value)
     tag->private = priv;
     tag->destroy = &destroy_int_and_float;
     tag->name = &tag_name;
-    tag->value = &value_int;
+    tag->as_string = &int_as_string;
     return tag;
 }
 
@@ -97,7 +97,7 @@ tag_new_bool(const char *name, bool value)
     tag->private = priv;
     tag->destroy = &destroy_int_and_float;
     tag->name = &tag_name;
-    tag->value = &value_bool;
+    tag->as_string = &bool_as_string;
     return tag;
 }
 
@@ -112,7 +112,7 @@ tag_new_float(const char *name, double value)
     tag->private = priv;
     tag->destroy = &destroy_int_and_float;
     tag->name = &tag_name;
-    tag->value = &value_float;
+    tag->as_string = &float_as_string;
     return tag;
 }
 
@@ -127,7 +127,7 @@ tag_new_string(const char *name, const char *value)
     tag->private = priv;
     tag->destroy = &destroy_string;
     tag->name = &tag_name;
-    tag->value = &value_string;
+    tag->as_string = &string_as_string;
     return tag;
 }
 
diff --git a/tag.h b/tag.h
index 4722b70..803e29b 100644
--- a/tag.h
+++ b/tag.h
@@ -9,7 +9,7 @@ struct tag {
 
     void (*destroy)(struct tag *tag);
     const char *(*name)(const struct tag *tag);
-    const char *(*value)(const struct tag *tag);
+    const char *(*as_string)(const struct tag *tag);
 };
 
 struct tag_set {