diff --git a/tools/genversion.cpp b/tools/genversion.cpp
index c6af106c1..2c097c616 100644
--- a/tools/genversion.cpp
+++ b/tools/genversion.cpp
@@ -78,6 +78,7 @@ int main(int argc, char * argv[]) {
 			file = fopen(gitrevfile, "r");
 			free(gitrevfile);
 			if (file) {
+				git_rev = (char*)calloc(sizeof(char), 1024);
 				if (fscanf(file, "%s", &git_rev) != 1) {
 					new_ver[4] = -1;
 				}