diff --git a/src/ctype.c b/src/ctype.c
index d9818f90..9edd8bfa 100644
--- a/src/ctype.c
+++ b/src/ctype.c
@@ -58,6 +58,13 @@ int ucd_isblank(codepoint_t c)
 	switch (ucd_lookup_category(c))
 	{
 	case UCD_CATEGORY_Zs:
+		switch (c) // Exclude characters with the <noBreak> DispositionType
+		{
+		case 0x00A0: // U+00A0 : NO-BREAK SPACE
+		case 0x2007: // U+2007 : FIGURE SPACE
+		case 0x202F: // U+202F : NARROW NO-BREAK SPACE
+			return 0;
+		}
 		return 1;
 	case UCD_CATEGORY_Cc:
 		return c == 0x09; // U+0009 : CHARACTER TABULATION
diff --git a/tests/printcdata.c b/tests/printcdata.c
index 12b52570..8580ac62 100644
--- a/tests/printcdata.c
+++ b/tests/printcdata.c
@@ -248,7 +248,7 @@ int main(int argc, char **argv)
 	else
 	{
 		for (codepoint_t c = 0; c <= 0x10FFFF; ++c)
-			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %iu %il\n");
+			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %ib %iu %il\n");
 	}
 	return 0;
 }
diff --git a/tests/printucddata.c b/tests/printucddata.c
index 7b24580a..62aaab8d 100644
--- a/tests/printucddata.c
+++ b/tests/printucddata.c
@@ -243,7 +243,7 @@ int main(int argc, char **argv)
 	else
 	{
 		for (codepoint_t c = 0; c <= 0x10FFFF; ++c)
-			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %iu %il\n");
+			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %ib %iu %il\n");
 	}
 	return 0;
 }
diff --git a/tests/printucddata_cpp.cpp b/tests/printucddata_cpp.cpp
index cfbb29be..e5542b61 100644
--- a/tests/printucddata_cpp.cpp
+++ b/tests/printucddata_cpp.cpp
@@ -243,7 +243,7 @@ int main(int argc, char **argv)
 	else
 	{
 		for (ucd::codepoint_t c = 0; c <= 0x10FFFF; ++c)
-			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %iu %il\n");
+			uprintf(stdout, c, format ? format : "%pH %s %C %c %UH %LH %TH %id %ix %is %ib %iu %il\n");
 	}
 	return 0;
 }
diff --git a/tools/printdata.py b/tools/printdata.py
index 7c173add..ebe61e92 100755
--- a/tools/printdata.py
+++ b/tools/printdata.py
@@ -56,6 +56,13 @@ def isspace(data):
 	else:
 		return 0
 
+def isblank(data): # word separator
+	if data.get('GeneralCategory', 'Cn') == 'Zs' or data['CodePoint'].char() == '\t':
+		dt = data.get('DecompositionType', '')
+		return 1 if dt == None or not dt.startswith('<noBreak>') else 0
+	else:
+		return 0
+
 def isupper(data):
 	if data.get('LowerCase', null) != null:
 		return 1
@@ -85,10 +92,10 @@ if __name__ == '__main__':
 		if title == null: title = codepoint
 		if upper == null: upper = codepoint
 		if lower == null: lower = codepoint
-		print('%s %s %s %s %s %s %s %s %s %s %s %s' % (
+		print('%s %s %s %s %s %s %s %s %s %s %s %s %s' % (
 		      codepoint, script,
 		      data.get('GeneralCategory', 'Cn')[0], data.get('GeneralCategory', 'Cn'),
 		      upper, lower, title,
 		      isdigit(data), isxdigit(data),
-		      isspace(data),
+		      isspace(data), isblank(data),
 		      isupper(data), islower(data)))