diff --git a/src/stdlib/SDL_string.c b/src/stdlib/SDL_string.c
index f1dbb655f..9e862792e 100644
--- a/src/stdlib/SDL_string.c
+++ b/src/stdlib/SDL_string.c
@@ -1356,7 +1356,7 @@ SDL_vsscanf(const char *text, const char *fmt, va_list ap)
                     break;
                 case 'f':
                     {
-                        double value;
+                        double value = 0;
                         advance = SDL_ScanFloat(text, &value);
                         text += advance;
                         if (advance && !suppress) {