diff --git a/exosphere/src/configitem.c b/exosphere/src/configitem.c
index 2eac903..4579e50 100644
--- a/exosphere/src/configitem.c
+++ b/exosphere/src/configitem.c
@@ -264,6 +264,10 @@
             /* UNOFFICIAL: Gets information about the current exosphere git commit hash. */
             *p_outvalue = ATMOSPHERE_RELEASE_VERSION_HASH;
             break;
+        case CONFIGITEM_HAS_RCM_BUG_PATCH:
+            /* UNOFFICIAL: Gets whether this unit has the RCM bug patched. */
+            *p_outvalue = (int)(fuse_has_rcm_bug_patch());;
+            break;
         default:
             result = 2;
             break;
diff --git a/exosphere/src/configitem.h b/exosphere/src/configitem.h
index e62a226..756d461 100644
--- a/exosphere/src/configitem.h
+++ b/exosphere/src/configitem.h
@@ -44,6 +44,7 @@
     CONFIGITEM_NEEDS_REBOOT = 65001,
     CONFIGITEM_NEEDS_SHUTDOWN = 65002,
     CONFIGITEM_EXOSPHERE_VERHASH = 65003,
+    CONFIGITEM_HAS_RCM_BUG_PATCH = 65004,
 } ConfigItem;
 
 #define REBOOT_KIND_NO_REBOOT     0
diff --git a/exosphere/src/fuse.c b/exosphere/src/fuse.c
index b33459f..cd16225 100644
--- a/exosphere/src/fuse.c
+++ b/exosphere/src/fuse.c
@@ -23,6 +23,7 @@
 #include "exocfg.h"
 
 #include "masterkey.h"
+
 /* Prototypes for internal commands. */
 void fuse_make_regs_visible(void);
 
@@ -257,3 +258,9 @@
 
     memcpy(dst, hw_info, 0x10);
 }
+
+bool fuse_has_rcm_bug_patch(void) {
+    /* Patched units have this bit set in reserved_sw, according to reports. */
+    /* TODO: Is there an ipatch we should check? This should be researched. */
+    return (FUSE_CHIP_REGS->FUSE_RESERVED_SW & 0x80) != 0;
+}
diff --git a/exosphere/src/fuse.h b/exosphere/src/fuse.h
index 9176893..c1c8dca 100644
--- a/exosphere/src/fuse.h
+++ b/exosphere/src/fuse.h
@@ -215,4 +215,6 @@
 uint32_t fuse_get_retail_type(void);
 void fuse_get_hardware_info(void *dst);
 
+bool fuse_has_rcm_bug_patch(void);
+
 #endif