diff --git a/src/common/Makefile.am b/src/common/Makefile.am
index e5efb97..07e139e 100644
--- a/src/common/Makefile.am
+++ b/src/common/Makefile.am
@@ -19,7 +19,8 @@ include_HEADERS = include/droid/version.h           \
                   include/droid/conversion.h        \
                   include/droid/droid-config.h      \
                   include/droid/droid-util.h        \
-                  include/droid/sllist.h
+                  include/droid/sllist.h            \
+                  include/droid/utils.h
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = libdroid-util.pc
@@ -29,6 +30,7 @@ libdroid_util_la_SOURCES = droid-util.c             \
                            conversion.c             \
                            config-parser-xml.c      \
                            sllist.c                 \
+                           utils.c                  \
                            droid-util-audio.h
 libdroid_util_la_LDFLAGS = -avoid-version -Wl,-z,noexecstack -lhybris-common $(SBJ_DEVICE_LDFLAGS)
 libdroid_util_la_LIBADD = $(AM_LIBADD)
diff --git a/src/common/include/droid/utils.h b/src/common/include/droid/utils.h
new file mode 100644
index 0000000..884d33b
--- /dev/null
+++ b/src/common/include/droid/utils.h
@@ -0,0 +1,32 @@
+#ifndef foodroidcommonutilsfoo
+#define foodroidcommonutilsfoo
+
+/*
+ * Copyright (C) 2022 Jolla Ltd.
+ *
+ * Contact: Juho Hämäläinen <juho.hamalainen@jolla.com>
+ *
+ * These PulseAudio Modules are free software; you can redistribute
+ * it and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
+ * USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+void dm_replace_in_place(char **string, const char *a, const char *b);
+bool dm_strcasestr(const char *haystack, const char *needle);
+
+#endif
diff --git a/src/common/utils.c b/src/common/utils.c
new file mode 100644
index 0000000..9d697d6
--- /dev/null
+++ b/src/common/utils.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 Jolla Ltd.
+ *
+ * Contact: Juho Hämäläinen <juho.hamalainen@jolla.com>
+ *
+ * These PulseAudio Modules are free software; you can redistribute
+ * it and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
+ * USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <strings.h>
+
+#include <pulsecore/core-util.h>
+#include <pulse/xmalloc.h>
+#include "droid/utils.h"
+
+void dm_replace_in_place(char **string, const char *a, const char *b) {
+    char *tmp;
+
+    pa_assert(*string);
+    pa_assert(a);
+    pa_assert(b);
+
+    tmp = pa_replace(*string, a, b);
+    pa_xfree(*string);
+    *string = tmp;
+}
+
+/* Simple strcasestr replacement. */
+bool dm_strcasestr(const char *haystack, const char *needle) {
+    size_t len_haystack, len_needle;
+
+    len_haystack = strlen(haystack);
+    len_needle = strlen(needle);
+
+    if (len_needle > len_haystack)
+        return false;
+
+    for (size_t i = 0; i < len_haystack; i++) {
+        if (len_needle > len_haystack - i)
+            return false;
+
+        if (strncasecmp(haystack + i, needle, len_needle) == 0)
+            return true;
+    }
+
+    return false;
+}