diff --git a/src/archive_list.c b/src/archive_list.c
index 8228fc961..e71b3036a 100644
--- a/src/archive_list.c
+++ b/src/archive_list.c
@@ -60,7 +60,8 @@ archive_plugin_from_suffix(const char *suffix)
 	for (i=0; i < num_archive_plugins; ++i) {
 		const struct archive_plugin *plugin = archive_plugins[i];
 		if (archive_plugins_enabled[i] &&
-		    stringFoundInStringArray(plugin->suffixes, suffix)) {
+		    plugin->suffixes != NULL &&
+		    string_array_contains(plugin->suffixes, suffix)) {
 			++i;
 			return plugin;
 		}
diff --git a/src/conf.c b/src/conf.c
index 803ad8503..4da44c775 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -95,16 +95,6 @@ static struct config_entry config_entries[] = {
 	{ .name = "filter", true, true },
 };
 
-static bool
-string_array_contains(const char *const* array, const char *value)
-{
-	for (const char *const* x = array; *x; x++)
-		if (g_ascii_strcasecmp(*x, value) == 0)
-			return true;
-
-	return false;
-}
-
 static bool
 get_bool(const char *value, bool *value_r)
 {
diff --git a/src/decoder_list.c b/src/decoder_list.c
index d30611e1b..ba8e34a8c 100644
--- a/src/decoder_list.c
+++ b/src/decoder_list.c
@@ -118,8 +118,8 @@ decoder_plugin_from_suffix(const char *suffix, unsigned int next)
 		i = 0;
 	for (; i < num_decoder_plugins; ++i) {
 		const struct decoder_plugin *plugin = decoder_plugins[i];
-		if (decoder_plugins_enabled[i] &&
-		    stringFoundInStringArray(plugin->suffixes, suffix)) {
+		if (decoder_plugins_enabled[i] && plugin->suffixes != NULL &&
+		    string_array_contains(plugin->suffixes, suffix)) {
 			++i;
 			return plugin;
 		}
@@ -140,8 +140,8 @@ decoder_plugin_from_mime_type(const char *mimeType, unsigned int next)
 		i = 0;
 	for (; i < num_decoder_plugins; ++i) {
 		const struct decoder_plugin *plugin = decoder_plugins[i];
-		if (decoder_plugins_enabled[i] &&
-		    stringFoundInStringArray(plugin->mime_types, mimeType)) {
+		if (decoder_plugins_enabled[i] && plugin->mime_types != NULL &&
+		    string_array_contains(plugin->mime_types, mimeType)) {
 			++i;
 			return plugin;
 		}
diff --git a/src/playlist_list.c b/src/playlist_list.c
index b5df72ed8..2c6237ed4 100644
--- a/src/playlist_list.c
+++ b/src/playlist_list.c
@@ -119,8 +119,8 @@ playlist_list_open_uri(const char *uri)
 	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
 		const struct playlist_plugin *plugin = playlist_plugins[i];
 
-		if (playlist_plugins_enabled[i] &&
-		    stringFoundInStringArray(plugin->schemes, scheme)) {
+		if (playlist_plugins_enabled[i] && plugin->schemes != NULL &&
+		    string_array_contains(plugin->schemes, scheme)) {
 			playlist = playlist_plugin_open_uri(plugin, uri);
 			if (playlist != NULL)
 				break;
@@ -143,7 +143,8 @@ playlist_list_open_stream_mime(struct input_stream *is)
 		const struct playlist_plugin *plugin = playlist_plugins[i];
 
 		if (playlist_plugins_enabled[i] &&
-		    stringFoundInStringArray(plugin->mime_types, is->mime)) {
+		    plugin->mime_types != NULL &&
+		    string_array_contains(plugin->mime_types, is->mime)) {
 			/* rewind the stream, so each plugin gets a
 			   fresh start */
 			input_stream_seek(is, 0, SEEK_SET);
@@ -168,8 +169,8 @@ playlist_list_open_stream_suffix(struct input_stream *is, const char *suffix)
 	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
 		const struct playlist_plugin *plugin = playlist_plugins[i];
 
-		if (playlist_plugins_enabled[i] &&
-		    stringFoundInStringArray(plugin->suffixes, suffix)) {
+		if (playlist_plugins_enabled[i] && plugin->suffixes != NULL &&
+		    string_array_contains(plugin->suffixes, suffix)) {
 			/* rewind the stream, so each plugin gets a
 			   fresh start */
 			input_stream_seek(is, 0, SEEK_SET);
@@ -213,8 +214,8 @@ playlist_suffix_supported(const char *suffix)
 	for (unsigned i = 0; playlist_plugins[i] != NULL; ++i) {
 		const struct playlist_plugin *plugin = playlist_plugins[i];
 
-		if (playlist_plugins_enabled[i] &&
-		    stringFoundInStringArray(plugin->suffixes, suffix))
+		if (playlist_plugins_enabled[i] && plugin->suffixes != NULL &&
+		    string_array_contains(plugin->suffixes, suffix))
 			return true;
 	}
 
diff --git a/src/utils.c b/src/utils.c
index 933a70a8c..ed8ef6c1a 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -132,13 +132,15 @@ int set_nonblocking(int fd)
 #endif
 }
 
-int stringFoundInStringArray(const char *const*array, const char *suffix)
+bool
+string_array_contains(const char *const* haystack, const char *needle)
 {
-	while (array && *array) {
-		if (g_ascii_strcasecmp(*array, suffix) == 0)
-			return 1;
-		array++;
-	}
+	assert(haystack != NULL);
+	assert(needle != NULL);
 
-	return 0;
+	for (; *haystack != NULL; ++haystack)
+		if (g_ascii_strcasecmp(*haystack, needle) == 0)
+			return true;
+
+	return false;
 }
diff --git a/src/utils.h b/src/utils.h
index d114003be..a77d4a03d 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -20,6 +20,8 @@
 #ifndef MPD_UTILS_H
 #define MPD_UTILS_H
 
+#include <stdbool.h>
+
 #ifndef assert_static
 /* Compile time assertion developed by Ralf Holly */
 /* http://pera-software.com/articles/compile-time-assertions.pdf */
@@ -33,6 +35,15 @@ char *parsePath(char *path);
 
 int set_nonblocking(int fd);
 
-int stringFoundInStringArray(const char *const*array, const char *suffix);
+/**
+ * Checks whether a string array contains the specified string.
+ *
+ * @param haystack a NULL terminated list of strings
+ * @param needle the string to search for; the comparison is
+ * case-insensitive for ASCII characters
+ * @return true if found
+ */
+bool
+string_array_contains(const char *const* haystack, const char *needle);
 
 #endif