diff --git a/source/blender/blenkernel/intern/unit.c b/source/blender/blenkernel/intern/unit.c
index 0d83695d2f1..d1fd0556fc6 100644
--- a/source/blender/blenkernel/intern/unit.c
+++ b/source/blender/blenkernel/intern/unit.c
@@ -645,7 +645,7 @@ bool bUnit_ReplaceString(char *str, int len_max, const char *str_prev, double sc
 	}
 
 	/* make lowercase */
-	BLI_ascii_strtolower(str, len_max);
+	BLI_str_tolower_ascii(str, len_max);
 
 	/* Try to find a default unit from current or previous string. */
 	default_unit = unit_detect_from_str(usys, str, str_prev);
diff --git a/source/blender/blenlib/BLI_string.h b/source/blender/blenlib/BLI_string.h
index 007cb1386ab..82780394ce7 100644
--- a/source/blender/blenlib/BLI_string.h
+++ b/source/blender/blenlib/BLI_string.h
@@ -81,8 +81,8 @@ int BLI_strcmp_ignore_pad(const char *str1, const char *str2, const char pad) AT
 
 size_t BLI_strnlen(const char *str, const size_t maxlen) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
 
-void BLI_ascii_strtolower(char *str, const size_t len) ATTR_NONNULL();
-void BLI_ascii_strtoupper(char *str, const size_t len) ATTR_NONNULL();
+void BLI_str_tolower_ascii(char *str, const size_t len) ATTR_NONNULL();
+void BLI_str_toupper_ascii(char *str, const size_t len) ATTR_NONNULL();
 int BLI_str_rstrip_float_zero(char *str, const char pad) ATTR_NONNULL();
 
 int BLI_str_index_in_array_n(const char *__restrict str, const char **__restrict str_array, const int str_array_len) ATTR_NONNULL();
diff --git a/source/blender/blenlib/intern/string.c b/source/blender/blenlib/intern/string.c
index 28cc5eb2f9f..6d75f7c4131 100644
--- a/source/blender/blenlib/intern/string.c
+++ b/source/blender/blenlib/intern/string.c
@@ -730,7 +730,7 @@ size_t BLI_strnlen(const char *s, const size_t maxlen)
 	return len;
 }
 
-void BLI_ascii_strtolower(char *str, const size_t len)
+void BLI_str_tolower_ascii(char *str, const size_t len)
 {
 	size_t i;
 
@@ -739,7 +739,7 @@ void BLI_ascii_strtolower(char *str, const size_t len)
 			str[i] += 'a' - 'A';
 }
 
-void BLI_ascii_strtoupper(char *str, const size_t len)
+void BLI_str_toupper_ascii(char *str, const size_t len)
 {
 	size_t i;
 
diff --git a/source/blender/windowmanager/intern/wm_operators.c b/source/blender/windowmanager/intern/wm_operators.c
index 60b102ccc65..c4f6a5aafdb 100644
--- a/source/blender/windowmanager/intern/wm_operators.c
+++ b/source/blender/windowmanager/intern/wm_operators.c
@@ -543,7 +543,7 @@ void WM_operator_py_idname(char *to, const char *from)
 		/* note, we use ascii tolower instead of system tolower, because the
 		 * latter depends on the locale, and can lead to idname mismatch */
 		memcpy(to, from, sizeof(char) * ofs);
-		BLI_ascii_strtolower(to, ofs);
+		BLI_str_tolower_ascii(to, ofs);
 
 		to[ofs] = '.';
 		BLI_strncpy(to + (ofs + 1), sep + 4, OP_MAX_TYPENAME - (ofs + 1));
@@ -564,7 +564,7 @@ void WM_operator_bl_idname(char *to, const char *from)
 			int ofs = (sep - from);
 
 			memcpy(to, from, sizeof(char) * ofs);
-			BLI_ascii_strtoupper(to, ofs);
+			BLI_str_toupper_ascii(to, ofs);
 			strcpy(to + ofs, "_OT_");
 			strcpy(to + (ofs + 4), sep + 1);
 		}