diff --git a/components/mediacore/base/src/sbBaseMediacoreMultibandEqualizer.cpp b/components/mediacore/base/src/sbBaseMediacoreMultibandEqualizer.cpp
index 2f5bcce976..c785a15ef9 100644
--- a/components/mediacore/base/src/sbBaseMediacoreMultibandEqualizer.cpp
+++ b/components/mediacore/base/src/sbBaseMediacoreMultibandEqualizer.cpp
@@ -503,13 +503,17 @@ sbBaseMediacoreMultibandEqualizer::SetCurrentPresetName(const nsAString& aCurren
                 // This should possibly be done in front-end code for the separation.
                 LOG(("Applying new GAIN value to the band slider"));
                 char* gainString;
-                rv = gain->ToString(&gainString);
+                SB_ConvertFloatEqGainToJSStringValue(gainValue, &gainString);
+                nsCOMPtr<nsISupportsString> supportsGainString(do_CreateInstance("@mozilla.org/supports-string;1"));
+                nsEmbedString sgsData(gainString);
+                rv = supportsGainString->SetData(sgsData, 64);
                 NS_ENSURE_SUCCESS(rv, rv);
+                
                 nsEmbedCString bandPrefName(NS_LITERAL_CSTRING("songbird.eq.band."));
                 bandPrefName.AppendInt(index);
                 
                 LOG(("Band: %i, Gain: %s", index, gainString));
-                rv = mPrefs->SetCharPref(bandPrefName.get(), gainString);
+                rv = mPrefs->SetComplexValue(bandPrefName.get(), NS_GET_IID(nsISupportsString), supportsGainString);
                 NS_ENSURE_SUCCESS(rv,  rv);
             }
         }