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-rw-r--r--engines/sci/engine/kstring.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/engines/sci/engine/kstring.cpp b/engines/sci/engine/kstring.cpp
index 4980e245ac..308d8064a2 100644
--- a/engines/sci/engine/kstring.cpp
+++ b/engines/sci/engine/kstring.cpp
@@ -447,7 +447,7 @@ reg_t kFormat(EngineState *s, int argc, reg_t *argv) {
switch (xfer) {
case 's': { /* Copy string */
reg_t reg = argv[startarg + paramindex];
- Common::String tempsource = kernel_lookup_text(s, reg,
+ Common::String tempsource = (reg == NULL_REG) ? "" : kernel_lookup_text(s, reg,
arguments[paramindex + 1]);
int slen = strlen(tempsource.c_str());
int extralen = str_leng - slen;