diff --git a/src/agg_gsv_text.cpp b/src/agg_gsv_text.cpp
index 608d05a..544de9b 100644
--- a/src/agg_gsv_text.cpp
+++ b/src/agg_gsv_text.cpp
@@ -616,6 +616,7 @@ namespace agg
                 }
                 m_status = next_char;
 
+                AGG_FALLTHROUGH
             case next_char:
                 if(*m_cur_chr == 0) 
                 {
@@ -634,6 +635,7 @@ namespace agg
                 m_eglyph = m_glyphs + value(m_indices + idx + 2);
                 m_status = start_glyph;
 
+                AGG_FALLTHROUGH
             case start_glyph:
                 *x = m_x;
                 *y = m_y;
diff --git a/src/agg_rounded_rect.cpp b/src/agg_rounded_rect.cpp
index d994fc6..8776c7b 100644
--- a/src/agg_rounded_rect.cpp
+++ b/src/agg_rounded_rect.cpp
@@ -114,44 +114,52 @@ namespace agg
             m_arc.rewind(0);
             m_status++;
 
+            AGG_FALLTHROUGH
         case 1:
             cmd = m_arc.vertex(x, y);
             if(is_stop(cmd)) m_status++;
             else return cmd;
 
+            AGG_FALLTHROUGH
         case 2:
             m_arc.init(m_x2 - m_rx2, m_y1 + m_ry2, m_rx2, m_ry2,
                        pi+pi*0.5, 0.0);
             m_arc.rewind(0);
             m_status++;
 
+            AGG_FALLTHROUGH
         case 3:
             cmd = m_arc.vertex(x, y);
             if(is_stop(cmd)) m_status++;
             else return path_cmd_line_to;
 
+            AGG_FALLTHROUGH
         case 4:
             m_arc.init(m_x2 - m_rx3, m_y2 - m_ry3, m_rx3, m_ry3,
                        0.0, pi*0.5);
             m_arc.rewind(0);
             m_status++;
 
+            AGG_FALLTHROUGH
         case 5:
             cmd = m_arc.vertex(x, y);
             if(is_stop(cmd)) m_status++;
             else return path_cmd_line_to;
 
+            AGG_FALLTHROUGH
         case 6:
             m_arc.init(m_x1 + m_rx4, m_y2 - m_ry4, m_rx4, m_ry4,
                        pi*0.5, pi);
             m_arc.rewind(0);
             m_status++;
 
+            AGG_FALLTHROUGH
         case 7:
             cmd = m_arc.vertex(x, y);
             if(is_stop(cmd)) m_status++;
             else return path_cmd_line_to;
 
+            AGG_FALLTHROUGH
         case 8:
             cmd = +path_cmd_end_poly | path_flags_close | path_flags_ccw;
             m_status++;
diff --git a/src/agg_vcgen_bspline.cpp b/src/agg_vcgen_bspline.cpp
index 4a0be66..7a4fb5d 100644
--- a/src/agg_vcgen_bspline.cpp
+++ b/src/agg_vcgen_bspline.cpp
@@ -133,6 +133,7 @@ namespace agg
             case initial:
                 rewind(0);
 
+                AGG_FALLTHROUGH
             case ready:
                 if(m_src_vertices.size() < 2)
                 {
@@ -155,6 +156,7 @@ namespace agg
                 m_status = polygon;
                 m_src_vertex = 0;
 
+                AGG_FALLTHROUGH
             case polygon:
                 if(m_cur_abscissa >= m_max_abscissa)
                 {
diff --git a/src/agg_vcgen_contour.cpp b/src/agg_vcgen_contour.cpp
index d7cf8a4..0733dfb 100644
--- a/src/agg_vcgen_contour.cpp
+++ b/src/agg_vcgen_contour.cpp
@@ -108,6 +108,7 @@ namespace agg
             case initial:
                 rewind(0);
 
+                AGG_FALLTHROUGH
             case ready:
                 if(m_src_vertices.size() < 2 + unsigned(m_closed != 0))
                 {
@@ -119,6 +120,7 @@ namespace agg
                 m_src_vertex = 0;
                 m_out_vertex = 0;
 
+                AGG_FALLTHROUGH
             case outline:
                 if(m_src_vertex >= m_src_vertices.size())
                 {
@@ -135,6 +137,7 @@ namespace agg
                 m_status = out_vertices;
                 m_out_vertex = 0;
 
+                AGG_FALLTHROUGH
             case out_vertices:
                 if(m_out_vertex >= m_out_vertices.size())
                 {
diff --git a/src/agg_vcgen_dash.cpp b/src/agg_vcgen_dash.cpp
index fd5d460..6482900 100644
--- a/src/agg_vcgen_dash.cpp
+++ b/src/agg_vcgen_dash.cpp
@@ -149,6 +149,7 @@ namespace agg
             case initial:
                 rewind(0);
 
+                AGG_FALLTHROUGH
             case ready:
                 if(m_num_dashes < 2 || m_src_vertices.size() < 2)
                 {
diff --git a/src/agg_vcgen_smooth_poly1.cpp b/src/agg_vcgen_smooth_poly1.cpp
index ff7d488..433b704 100644
--- a/src/agg_vcgen_smooth_poly1.cpp
+++ b/src/agg_vcgen_smooth_poly1.cpp
@@ -109,6 +109,7 @@ namespace agg
             case initial:
                 rewind(0);
 
+                AGG_FALLTHROUGH
             case ready:
                 if(m_src_vertices.size() <  2)
                 {
@@ -131,6 +132,7 @@ namespace agg
                 m_status = polygon;
                 m_src_vertex = 0;
 
+                AGG_FALLTHROUGH
             case polygon:
                 if(m_closed)
                 {
diff --git a/src/agg_vcgen_stroke.cpp b/src/agg_vcgen_stroke.cpp
index eda5fd5..0083448 100644
--- a/src/agg_vcgen_stroke.cpp
+++ b/src/agg_vcgen_stroke.cpp
@@ -91,6 +91,7 @@ namespace agg
             case initial:
                 rewind(0);
 
+                AGG_FALLTHROUGH
             case ready:
                 if(m_src_vertices.size() < 2 + unsigned(m_closed != 0))
                 {
@@ -158,6 +159,7 @@ namespace agg
                 m_status = outline2;
                 cmd = path_cmd_move_to;
 
+                AGG_FALLTHROUGH
             case outline2:
                 if(m_src_vertex <= unsigned(m_closed == 0))
                 {