diff --git a/libutils/String8.cpp b/libutils/String8.cpp
index 4d242a7a3..ac3208e47 100644
--- a/libutils/String8.cpp
+++ b/libutils/String8.cpp
@@ -426,19 +426,6 @@ void String8::toLower()
     unlockBuffer(length);
 }
 
-void String8::toUpper()
-{
-    const size_t length = size();
-    if (length == 0) return;
-
-    char* buf = lockBuffer(length);
-    for (size_t i = length; i > 0; --i) {
-        *buf = static_cast<char>(toupper(*buf));
-        buf++;
-    }
-    unlockBuffer(length);
-}
-
 // ---------------------------------------------------------------------------
 // Path functions
 
diff --git a/libutils/String8_fuzz.cpp b/libutils/String8_fuzz.cpp
index b02683c42..a45d67514 100644
--- a/libutils/String8_fuzz.cpp
+++ b/libutils/String8_fuzz.cpp
@@ -41,9 +41,6 @@ std::vector<std::function<void(FuzzedDataProvider*, android::String8*, android::
                 },
 
                 // Casing
-                [](FuzzedDataProvider*, android::String8* str1, android::String8*) -> void {
-                    str1->toUpper();
-                },
                 [](FuzzedDataProvider*, android::String8* str1, android::String8*) -> void {
                     str1->toLower();
                 },
diff --git a/libutils/include/utils/String8.h b/libutils/include/utils/String8.h
index 84f14d073..cee5dc640 100644
--- a/libutils/include/utils/String8.h
+++ b/libutils/include/utils/String8.h
@@ -130,7 +130,6 @@ public:
             bool                removeAll(const char* other);
 
             void                toLower();
-            void                toUpper();
 
 
     /*