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-rw-r--r--ext/json/ext/generator/generator.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/json/ext/generator/generator.c b/ext/json/ext/generator/generator.c
index 446235c695..cc639f9a34 100644
--- a/ext/json/ext/generator/generator.c
+++ b/ext/json/ext/generator/generator.c
@@ -9,7 +9,7 @@
#define check_max_nesting(state, depth) do { \
long current_nesting = 1 + depth; \
if (state->max_nesting != 0 && current_nesting > state->max_nesting) \
- rb_raise(eNestingError, "nesting of %u is too deep", current_nesting); \
+ rb_raise(eNestingError, "nesting of %ld is too deep", current_nesting); \
} while (0);
static VALUE mJSON, mExt, mGenerator, cState, mGeneratorMethods, mObject,