diff --git a/src/detect-byte-extract.c b/src/detect-byte-extract.c
index f2b566ba03..870c59b600 100644
--- a/src/detect-byte-extract.c
+++ b/src/detect-byte-extract.c
@@ -78,7 +78,7 @@
 #define PARSE_REGEX "^"                                                  \
     "\\s*([0-9]+)\\s*"                                                   \
     ",\\s*([0-9]+)\\s*"                                                  \
-    ",\\s*([0-9a-zA-Z]+)\\s*"                                            \
+    ",\\s*([^\\s,]+)\\s*"                                                \
     "(?:(?:,\\s*([^\\s,]+)\\s*)|(?:,\\s*([^\\s,]+)\\s+([^\\s,]+)\\s*))?" \
     "(?:(?:,\\s*([^\\s,]+)\\s*)|(?:,\\s*([^\\s,]+)\\s+([^\\s,]+)\\s*))?" \
     "(?:(?:,\\s*([^\\s,]+)\\s*)|(?:,\\s*([^\\s,]+)\\s+([^\\s,]+)\\s*))?" \