diff --git a/src/log.c b/src/log.c
index 3f41c0c..b822e85 100644
--- a/src/log.c
+++ b/src/log.c
@@ -8,6 +8,8 @@
 
 #include <glib.h>
 
+#include "utils.h"
+
 static GLogLevelFlags log_level = G_LOG_LEVEL_WARNING;
 
 /* see log.h */
diff --git a/src/utils.c b/src/utils.c
index fa5ae40..761dca9 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -6,7 +6,6 @@
 #include <glib.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <time.h>
 
 #include "log.h"
diff --git a/src/utils.h b/src/utils.h
index 5cef754..29c4812 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -3,9 +3,18 @@
 #define DUNST_UTILS_H
 
 #include <glib.h>
+#include <string.h>
 
+//! Test if a string is NULL or empty
 #define STR_EMPTY(s) (!s || (*s == '\0'))
+//! Test if a string is non-NULL and not empty
 #define STR_FULL(s) !(STR_EMPTY(s))
+//! Test if string a and b contain the same chars
+#define STR_EQ(a, b) (strcmp(a, b) == 0)
+//! Test if string a and b are same up to n chars
+#define STRN_EQ(a, b, n) (strncmp(a, b, n) == 0)
+//! Test if string a and b are the same case-insensitively
+#define STR_CASEQ(a, b) (strcasecmp(a, b) == 0)
 
 /* replace all occurrences of the character needle with the character replacement in haystack */
 char *string_replace_char(char needle, char replacement, char *haystack);
diff --git a/src/x11/screen.c b/src/x11/screen.c
index edf9838..d7fbfbf 100644
--- a/src/x11/screen.c
+++ b/src/x11/screen.c
@@ -17,6 +17,7 @@
 
 #include "src/log.h"
 #include "src/settings.h"
+#include "src/utils.h"
 #include "x.h"
 
 struct screen_info *screens;