diff --git a/detools/version.py b/detools/version.py
index cac7112..9b01039 100644
--- a/detools/version.py
+++ b/detools/version.py
@@ -1 +1 @@
-__version__ = '0.34.0'
+__version__ = '0.34.1'
diff --git a/src/c/detools.h b/src/c/detools.h
index b8e3000..2195318 100644
--- a/src/c/detools.h
+++ b/src/c/detools.h
@@ -60,6 +60,8 @@
 #include <stdio.h>
 #include <stdbool.h>
 
+#define PBTOOLS_VERSION                  "0.34.1"
+
 /* Error codes. */
 #define DETOOLS_OK                              0
 #define DETOOLS_NOT_IMPLEMENTED                 1