diff --git a/icu4c/source/i18n/decimfmt.cpp b/icu4c/source/i18n/decimfmt.cpp
index 67a0aa11fe5c..7461bb743ccc 100644
--- a/icu4c/source/i18n/decimfmt.cpp
+++ b/icu4c/source/i18n/decimfmt.cpp
@@ -1647,7 +1647,9 @@ void DecimalFormat::touch(UErrorCode& status) {
     delete fields->atomicCurrencyParser.exchange(nullptr);
 #else
     delete fields->atomicParser;
+    fields->atomicParser = nullptr;
     delete fields->atomicCurrencyParser;
+    fields->atomicCurrencyParser = nullptr;
 #endif
 
     // In order for the getters to work, we need to populate some fields in NumberFormat.
diff --git a/icu4c/source/i18n/number_mapper.h b/icu4c/source/i18n/number_mapper.h
index def4fec594d6..afac55415b5c 100644
--- a/icu4c/source/i18n/number_mapper.h
+++ b/icu4c/source/i18n/number_mapper.h
@@ -201,7 +201,7 @@ struct DecimalFormatFields : public UMemory {
 #if U_HAVE_ATOMICS
     std::atomic<::icu::numparse::impl::NumberParserImpl*> atomicParser = {};
 #else
-    ::icu::numparse::impl::NumberParserImpl* atomicParser = nullptr;
+    ::icu::numparse::impl::NumberParserImpl* atomicParser = {};
 #endif
 
     /** The lazy-computed parser for .parseCurrency() */