diff --git a/src/gamelog.cpp b/src/gamelog.cpp
index aba915ea40..11b6518510 100644
--- a/src/gamelog.cpp
+++ b/src/gamelog.cpp
@@ -754,6 +754,8 @@ static void Load_GLOG()
 			la->change = ReallocT(la->change, la->changes + 1);
 
 			LoggedChange *lc = &la->change[la->changes++];
+			/* for SLE_STR, pointer has to be valid! so make it NULL */
+			memset(lc, 0, sizeof(*lc));
 			lc->ct = ct;
 
 			assert((uint)ct < GLCT_END);