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-rw-r--r--lib/ppm.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/ppm.h b/lib/ppm.h
index 7a24f926..82241b70 100644
--- a/lib/ppm.h
+++ b/lib/ppm.h
@@ -77,7 +77,7 @@ ppm_blackpixel(void) {
     return retval;
 }
 
-void ppm_init(int * argcP, char* argv[]);
+void ppm_init(int * const argcP, char ** const argv);
 
 #define ppm_allocarray(cols, rows) \
   ((pixel**) pm_allocarray(cols, rows, sizeof(pixel)))