diff --git a/mapogcsld.c b/mapogcsld.c
index 4fe15f2cb4..bd6d85af45 100644
--- a/mapogcsld.c
+++ b/mapogcsld.c
@@ -2108,8 +2108,6 @@ int msSLDGetMarkSymbol(mapObj *map, char *pszSymbolName, int bFilled)
   return nSymbolId;
 }
 
-static const unsigned char PNGsig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; /* 89 50 4E 47 0D 0A 1A 0A hex */
-
 /************************************************************************/
 /*                          msSLDGetGraphicSymbol                       */
 /*                                                                      */
diff --git a/mappostgis.c b/mappostgis.c
index fd67f59c46..c5e1145c81 100644
--- a/mappostgis.c
+++ b/mappostgis.c
@@ -305,19 +305,6 @@ wkbReadInt(wkbObj *w)
   return i;
 }
 
-/*
-** Read one double from the WKB and advance the read pointer.
-** We assume the endianess of the WKB is the same as this machine.
-*/
-static inline double
-wkbReadDouble(wkbObj *w)
-{
-  double d;
-  memcpy(&d, w->ptr, sizeof(double));
-  w->ptr += sizeof(double);
-  return d;
-}
-
 /*
 ** Read one pointObj (two doubles) from the WKB and advance the read pointer.
 ** We assume the endianess of the WKB is the same as this machine.
@@ -741,19 +728,6 @@ wkbConvGeometryToShape(wkbObj *w, shapeObj *shape)
 }
 
 
-/*
-** Calculate determinant of a 3x3 matrix. Handy for
-** the circle center calculation.
-*/
-static inline double
-arcDeterminant3x3(double *m)
-{
-  /* This had better be a 3x3 matrix or we'll fall to bits */
-  return m[0] * ( m[4] * m[8] - m[7] * m[5] ) -
-         m[3] * ( m[1] * m[8] - m[7] * m[2] ) +
-         m[6] * ( m[1] * m[5] - m[4] * m[2] );
-}
-
 /*
 ** What side of p1->p2 is q on?
 */
diff --git a/mapsymbol.c b/mapsymbol.c
index 679ec5eff9..2d5b5b2d84 100644
--- a/mapsymbol.c
+++ b/mapsymbol.c
@@ -48,10 +48,6 @@ extern FILE *msyyin;
 
 extern int msyystate;
 
-static const unsigned char PNGsig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; /* 89 50 4E 47 0D 0A 1A 0A hex */
-static const unsigned char JPEGsig[3] = {255, 216, 255}; /* FF D8 FF hex */
-
-
 void freeImageCache(struct imageCacheObj *ic)
 {
   if(ic) {
diff --git a/renderers/agg/src/agg_curves.cpp b/renderers/agg/src/agg_curves.cpp
index ba33867cac..73521890f7 100644
--- a/renderers/agg/src/agg_curves.cpp
+++ b/renderers/agg/src/agg_curves.cpp
@@ -21,7 +21,6 @@ namespace mapserver
 {
 
     //------------------------------------------------------------------------
-    const double curve_distance_epsilon                  = 1e-30;
     const double curve_collinearity_epsilon              = 1e-30;
     const double curve_angle_tolerance_epsilon           = 0.01;
     enum curve_recursion_limit_e { curve_recursion_limit = 32 };