diff --git a/src/include/ucd/ucd.h b/src/include/ucd/ucd.h
index 341f1e6d..e6bd0ad1 100644
--- a/src/include/ucd/ucd.h
+++ b/src/include/ucd/ucd.h
@@ -356,6 +356,7 @@ enum
 	UCD_PROPERTY_DEPRECATED                         = 0x0000000000800000ull, /**< @brief Deprecated */
 	UCD_PROPERTY_SOFT_DOTTED                        = 0x0000000001000000ull, /**< @brief Soft_Dotted */
 	UCD_PROPERTY_LOGICAL_ORDER_EXCEPTION            = 0x0000000002000000ull, /**< @brief Logical_Order_Exception */
+	UCD_PROPERTY_OTHER_ID_START                     = 0x0000000004000000ull, /**< @brief Other_ID_Start */
 };
 
 /** @brief Return the properties of the specified codepoint.
@@ -842,6 +843,7 @@ namespace ucd
 		Deprecated = UCD_PROPERTY_DEPRECATED, /**< @brief Deprecated */
 		Soft_Dotted = UCD_PROPERTY_SOFT_DOTTED, /**< @brief Soft_Dotted */
 		Logical_Order_Exception = UCD_PROPERTY_LOGICAL_ORDER_EXCEPTION, /**< @brief Logical_Order_Exception */
+		Other_ID_Start = UCD_PROPERTY_OTHER_ID_START, /**< @brief Other_ID_Start */
 	};
 
 	/** @brief Return the properties of the specified codepoint.
diff --git a/src/proplist.c b/src/proplist.c
index 0a241f5a..b8b9fdc0 100644
--- a/src/proplist.c
+++ b/src/proplist.c
@@ -854,7 +854,7 @@ static int properties_Mn(codepoint_t c)
 		if (c == 0x17DD)                return UCD_PROPERTY_DIACRITIC;
 		break;
 	case 0x1800:
-		if (c >= 0x1885 && c <= 0x1886) return UCD_PROPERTY_OTHER_ALPHABETIC;
+		if (c >= 0x1885 && c <= 0x1886) return UCD_PROPERTY_OTHER_ALPHABETIC | UCD_PROPERTY_OTHER_ID_START;
 		if (c == 0x18A9)                return UCD_PROPERTY_OTHER_ALPHABETIC;
 		break;
 	case 0x1900:
@@ -1530,7 +1530,7 @@ static int properties_Sk(codepoint_t c)
 		if (c >= 0x1FFD && c <= 0x1FFE) return UCD_PROPERTY_DIACRITIC;
 		break;
 	case 0x3000:
-		if (c >= 0x309B && c <= 0x309C) return UCD_PROPERTY_DIACRITIC;
+		if (c >= 0x309B && c <= 0x309C) return UCD_PROPERTY_DIACRITIC | UCD_PROPERTY_OTHER_ID_START;
 		break;
 	case 0xA700:
 		if (c >= 0xA720 && c <= 0xA721) return UCD_PROPERTY_DIACRITIC;
@@ -1555,6 +1555,9 @@ static int properties_Sm(codepoint_t c)
 		if (c == 0x207B)                return UCD_PROPERTY_DASH;
 		if (c == 0x208B)                return UCD_PROPERTY_DASH;
 		break;
+	case 0x2100:
+		if (c == 0x2118)                return UCD_PROPERTY_OTHER_ID_START;
+		break;
 	case 0x2200:
 		if (c == 0x2212)                return UCD_PROPERTY_DASH;
 		break;
@@ -1568,6 +1571,7 @@ static int properties_So(codepoint_t c)
 	{
 	case 0x2100:
 		if (c == 0x2129)                return UCD_PROPERTY_OTHER_MATH;
+		if (c == 0x212E)                return UCD_PROPERTY_OTHER_ID_START;
 		if (c >= 0x2195 && c <= 0x2199) return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x219C && c <= 0x219F) return UCD_PROPERTY_OTHER_MATH;
 		if (c >= 0x21A1 && c <= 0x21A2) return UCD_PROPERTY_OTHER_MATH;
diff --git a/tools/printdata.py b/tools/printdata.py
index 67c65ba9..ff275e07 100755
--- a/tools/printdata.py
+++ b/tools/printdata.py
@@ -147,6 +147,7 @@ def properties(data):
 	props += (2 ** 23) * data.get('Deprecated', 0)
 	props += (2 ** 24) * data.get('Soft_Dotted', 0)
 	props += (2 ** 25) * data.get('Logical_Order_Exception', 0)
+	props += (2 ** 26) * data.get('Other_ID_Start', 0)
 	return props
 
 if __name__ == '__main__':