diff --git a/docs/manual/errors-list.html b/docs/manual/errors-list.html
index 50f7fc66..b0f82274 100644
--- a/docs/manual/errors-list.html
+++ b/docs/manual/errors-list.html
@@ -202,7 +202,7 @@
 <tr><td>Einvalid_global_label</td><td>Global label definition contains an invalid label [%s].</td></tr>
 <tr><td>Espc700_addr_out_of_range</td><td>Address %s out of range for instruction, valid range is 0000-1FFF</td></tr>
 <tr><td>Elabel_ambiguous</td><td>Label (%s) location is ambiguous due to straddling optimization border.</td></tr>
-<tr><td>Efeature_unavaliable_in_spcblock</td><td>This feature may not be used while an spcblock is active</td></tr>
+<tr><td>Efeature_unavailable_in_spcblock</td><td>This feature may not be used while an spcblock is active</td></tr>
 <tr><td>Eendspcblock_without_spcblock</td><td>Use of endspcblock without matching spcblock</td></tr>
 <tr><td>Emissing_endspcblock</td><td>Use of endspcblock without matching spcblock</td></tr>
 <tr><td>Espcblock_bad_arch</td><td>spcblock only valid inside spc700 arch</td></tr>
diff --git a/src/asar/assembleblock.cpp b/src/asar/assembleblock.cpp
index 91695a86..3f09663f 100644
--- a/src/asar/assembleblock.cpp
+++ b/src/asar/assembleblock.cpp
@@ -1625,7 +1625,7 @@ void assembleblock(const char * block, bool isspecialline)
 	else if (assemblemapper(word, numwords)) {}
 	else if (is1("org"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		freespaceend();
 		unsigned int num=getnum(par);
 		if (forwardlabel) asar_throw_error(0, error_type_block, error_id_org_label_forward);
@@ -1954,7 +1954,7 @@ void assembleblock(const char * block, bool isspecialline)
 	}
 	else if (is("freespace") || is("freecode") || is("freedata"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		if (emulatexkas) asar_throw_warning(0, warning_id_convert_to_asar);
 		string parstr;
 		if (numwords==1) parstr="\n";//crappy hack: impossible character to cut out extra commas
@@ -2047,7 +2047,7 @@ void assembleblock(const char * block, bool isspecialline)
 	}
 	else if (is1("prot"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		if (!confirmqpar(par)) asar_throw_error(0, error_type_block, error_id_mismatched_parentheses);
 		if (!ratsmetastate) asar_throw_error(2, error_type_block, error_id_prot_not_at_freespace_start);
 		if (ratsmetastate==ratsmeta_used) step(-5);
@@ -2080,7 +2080,7 @@ void assembleblock(const char * block, bool isspecialline)
 	}
 	else if (is1("autoclean") || is2("autoclean") || is1("autoclear") || is2("autoclear"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		if (is1("autoclear") || is2("autoclear")) asar_throw_warning(0, warning_id_autoclear_deprecated);
 		if (numwords==3)
 		{
@@ -2213,7 +2213,7 @@ void assembleblock(const char * block, bool isspecialline)
 	}
 	else if (is0("pushns"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		pushns[pushnsnum].ns = ns;
 		for(int i = 0; i < namespace_list.count; i++)
 		{
@@ -2228,7 +2228,7 @@ void assembleblock(const char * block, bool isspecialline)
 	}
 	else if (is0("pullns"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		if (!pushnsnum) asar_throw_error(0, error_type_block, error_id_pullns_without_pushns);
 		pushnsnum--;
 		ns = pushns[pushnsnum].ns;
@@ -2241,7 +2241,7 @@ void assembleblock(const char * block, bool isspecialline)
 	}
 	else if (is1("namespace") || is2("namespace"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		bool leave = false;
 		if (par)
 		{
@@ -2647,7 +2647,7 @@ void assembleblock(const char * block, bool isspecialline)
 	}
 	else if (is1("arch"))
 	{
-		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+		if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 		if (emulatexkas) asar_throw_warning(0, warning_id_convert_to_asar);
 		if (!stricmp(par, "65816")) { arch=arch_65816; return; }
 		if (!stricmp(par, "spc700")) { arch=arch_spc700; return; }
@@ -2786,7 +2786,7 @@ bool assemblemapper(char** word, int numwords)
 	}
 	else return false;
 
-	if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavaliable_in_spcblock);
+	if(in_spcblock) asar_throw_error(0, error_type_block, error_id_feature_unavailable_in_spcblock);
 	if(!mapper_set){
 		mapper_set = true;
 	}else if(previous_mapper != mapper){
diff --git a/src/asar/errors.cpp b/src/asar/errors.cpp
index a74a657d..bcc31add 100644
--- a/src/asar/errors.cpp
+++ b/src/asar/errors.cpp
@@ -264,7 +264,7 @@ static asar_error_mapping asar_errors[] =
 	{ ERR(spc700_addr_out_of_range), "Address %s out of range for instruction, valid range is 0000-1FFF" },
 	{ ERR(label_ambiguous), "Label (%s) location is ambiguous due to straddling optimization border." },
 
-	{ ERR(feature_unavaliable_in_spcblock), "This feature may not be used while an spcblock is active" },
+	{ ERR(feature_unavailable_in_spcblock), "This feature may not be used while an spcblock is active" },
 	{ ERR(endspcblock_without_spcblock), "Use of endspcblock without matching spcblock" },
 	{ ERR(missing_endspcblock), "Use of endspcblock without matching spcblock" },
 	{ ERR(spcblock_bad_arch), "spcblock only valid inside spc700 arch" },
diff --git a/src/asar/errors.h b/src/asar/errors.h
index 430c5d4a..6fbd8d2c 100644
--- a/src/asar/errors.h
+++ b/src/asar/errors.h
@@ -238,7 +238,7 @@ enum asar_error_id : int
 	error_id_spc700_addr_out_of_range,
 	error_id_label_ambiguous,
 
-	error_id_feature_unavaliable_in_spcblock,
+	error_id_feature_unavailable_in_spcblock,
 	error_id_endspcblock_without_spcblock,
 	error_id_missing_endspcblock,
 	error_id_spcblock_bad_arch,