diff --git a/doc/variables.xml b/doc/variables.xml
index 2c6dc6ed..1bcbcc53 100644
--- a/doc/variables.xml
+++ b/doc/variables.xml
@@ -7,8 +7,8 @@
             <option>(adapter)</option>
         </term>
         <listitem>ACPI ac adapter state. On linux, the adapter option specifies the
-        subfolder of /sys/class/power_supply containing the state information (defaults
-        to "AC"). Other systems ignore it.
+        subfolder of /sys/class/power_supply containing the state information (tries "AC"
+        and "ADP1" if there is no argument given). Non-linux systems ignore it.
         <para /></listitem>
     </varlistentry>
     <varlistentry>
diff --git a/src/core.c b/src/core.c
index a7132c6c..ac1a7f30 100644
--- a/src/core.c
+++ b/src/core.c
@@ -171,8 +171,6 @@ struct text_object *construct_text_object(const char *s, const char *arg, long
 			NORM_ERR("acpiacadapter: arg is only used on linux");
 #endif
 		}
-		if(! obj->data.opaque)
-			obj->data.opaque = strdup("AC");
 #endif /* !__OpenBSD__ */
 	END OBJ(freq, 0)
 		get_cpu_count();
diff --git a/src/linux.c b/src/linux.c
index a41220e6..3185217c 100644
--- a/src/linux.c
+++ b/src/linux.c
@@ -1336,6 +1336,8 @@ void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size)
 
    Update: it seems the folder name is hardware-dependent. We add an aditional adapter
    argument, specifying the folder name.
+
+   Update: on some systems it's /sys/class/power_supply/ADP1 instead of /sys/class/power_supply/AC
 */
 
 void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size, const char *adapter)
@@ -1344,14 +1346,20 @@ void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size, const
 
 	char buf[256];
 	char buf2[256];
+	struct stat sb;
 	FILE *fp;
 
 	if (!p_client_buffer || client_buffer_size <= 0) {
 		return;
 	}
 
-	snprintf(buf2, sizeof(buf2), "%s/%s/uevent", SYSFS_AC_ADAPTER_DIR, adapter);
-	fp = open_file(buf2, &rep);
+	if(adapter)
+		snprintf(buf2, sizeof(buf2), "%s/%s/uevent", SYSFS_AC_ADAPTER_DIR, adapter);
+	else{
+		snprintf(buf2, sizeof(buf2), "%s/AC/uevent", SYSFS_AC_ADAPTER_DIR);
+		if(stat(buf2, &sb) == -1) snprintf(buf2, sizeof(buf2), "%s/ADP1/uevent", SYSFS_AC_ADAPTER_DIR);
+	}
+	if(stat(buf2, &sb) == 0) fp = open_file(buf2, &rep); else fp = 0;
 	if (fp) {
 		/* sysfs processing */
 		while (!feof(fp)) {