diff --git a/src/test/fuzz/string.cpp b/src/test/fuzz/string.cpp
index 2c7b19e39a..e7c046373e 100644
--- a/src/test/fuzz/string.cpp
+++ b/src/test/fuzz/string.cpp
@@ -45,7 +45,8 @@ void test_one_input(const std::vector<uint8_t>& buffer)
     (void)CopyrightHolders(random_string_1, fuzzed_data_provider.ConsumeIntegral<unsigned int>(), fuzzed_data_provider.ConsumeIntegral<unsigned int>());
     FeeEstimateMode fee_estimate_mode;
     (void)FeeModeFromString(random_string_1, fee_estimate_mode);
-    (void)FormatParagraph(random_string_1, fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 1000), fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 1000));
+    const auto width{fuzzed_data_provider.ConsumeIntegralInRange<size_t>(1, 1000)};
+    (void)FormatParagraph(random_string_1, width, fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, width));
     (void)FormatSubVersion(random_string_1, fuzzed_data_provider.ConsumeIntegral<int>(), random_string_vector);
     (void)GetDescriptorChecksum(random_string_1);
     (void)HelpExampleCli(random_string_1, random_string_2);
diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp
index bcbaac3291..0bfdb083a1 100644
--- a/src/util/strencodings.cpp
+++ b/src/util/strencodings.cpp
@@ -384,6 +384,7 @@ bool ParseDouble(const std::string& str, double *out)
 
 std::string FormatParagraph(const std::string& in, size_t width, size_t indent)
 {
+    assert(width >= indent);
     std::stringstream out;
     size_t ptr = 0;
     size_t indented = 0;