diff --git a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
index 42741147..8e328637 100644
--- a/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
+++ b/LEGO1/lego/legoomni/src/video/legoanimpresenter.cpp
@@ -312,7 +312,7 @@ void LegoAnimPresenter::FUN_100695c0()
 					LegoU32 len = strlen(actorName);
 					strcpy(lodName, actorName);
 
-					for (LegoChar* i = &lodName[len - 1]; isdigit(*i) || *i == '_'; i--) {
+					for (LegoChar* i = &lodName[len - 1]; SDL_isdigit(*i) || *i == '_'; i--) {
 						*i = '\0';
 					}