diff --git a/include/share/replaygain_analysis.h b/include/share/replaygain_analysis.h
index f992c456..02067d21 100644
--- a/include/share/replaygain_analysis.h
+++ b/include/share/replaygain_analysis.h
@@ -44,7 +44,7 @@ extern "C" {
 
 typedef float   Float_t;         /* Type used for filtering */
 
-Float_t ReplayGainReferenceLoudness; /* in dB SPL, currently == 89.0 */
+extern Float_t ReplayGainReferenceLoudness; /* in dB SPL, currently == 89.0 */
 
 int     InitGainAnalysis ( long samplefreq );
 int     AnalyzeSamples   ( const Float_t* left_samples, const Float_t* right_samples, size_t num_samples, int num_channels );
diff --git a/src/share/replaygain_analysis/replaygain_analysis.c b/src/share/replaygain_analysis/replaygain_analysis.c
index a11465c8..32a1ab77 100644
--- a/src/share/replaygain_analysis/replaygain_analysis.c
+++ b/src/share/replaygain_analysis/replaygain_analysis.c
@@ -100,7 +100,7 @@
 
 #include "replaygain_analysis.h"
 
-extern Float_t ReplayGainReferenceLoudness = 89.0; /* in dB SPL */
+Float_t ReplayGainReferenceLoudness = 89.0; /* in dB SPL */
 
 typedef unsigned short  Uint16_t;
 typedef signed short    Int16_t;