diff --git a/image/decoders/icon/nsIconURI.cpp b/image/decoders/icon/nsIconURI.cpp
index 9ea22deaf02f..d917337bf90b 100644
--- a/image/decoders/icon/nsIconURI.cpp
+++ b/image/decoders/icon/nsIconURI.cpp
@@ -19,6 +19,7 @@
 #include "nsIURL.h"
 #include "nsNetUtil.h"
 #include "plstr.h"
+#include "nsCRT.h"
 #include <stdlib.h>
 
 using namespace mozilla;
@@ -218,7 +219,7 @@ nsresult nsMozIconURI::SetSpecInternal(const nsACString& aSpec) {
     if (!sizeString.IsEmpty()) {
       const char* sizeStr = sizeString.get();
       for (uint32_t i = 0; i < ArrayLength(kSizeStrings); i++) {
-        if (PL_strcasecmp(sizeStr, kSizeStrings[i]) == 0) {
+        if (nsCRT::strcasecmp(sizeStr, kSizeStrings[i]) == 0) {
           mIconSize = i;
           break;
         }
@@ -235,7 +236,7 @@ nsresult nsMozIconURI::SetSpecInternal(const nsACString& aSpec) {
     if (!stateString.IsEmpty()) {
       const char* stateStr = stateString.get();
       for (uint32_t i = 0; i < ArrayLength(kStateStrings); i++) {
-        if (PL_strcasecmp(stateStr, kStateStrings[i]) == 0) {
+        if (nsCRT::strcasecmp(stateStr, kStateStrings[i]) == 0) {
           mIconState = i;
           break;
         }
@@ -412,7 +413,7 @@ nsMozIconURI::Equals(nsIURI* other, bool* result) {
   rv = other->GetSpec(spec2);
   NS_ENSURE_SUCCESS(rv, rv);
 
-  if (!PL_strcasecmp(spec1.get(), spec2.get())) {
+  if (!nsCRT::strcasecmp(spec1.get(), spec2.get())) {
     *result = true;
   } else {
     *result = false;
@@ -435,7 +436,7 @@ nsMozIconURI::SchemeIs(const char* aScheme, bool* aEquals) {
     return NS_OK;
   }
 
-  *aEquals = PL_strcasecmp("moz-icon", aScheme) ? false : true;
+  *aEquals = nsCRT::strcasecmp("moz-icon", aScheme) == 0;
   return NS_OK;
 }