diff --git a/src/btop_shared.hpp b/src/btop_shared.hpp
index 919bc31..f9275a4 100644
--- a/src/btop_shared.hpp
+++ b/src/btop_shared.hpp
@@ -262,7 +262,7 @@ namespace Proc {
         double cpu_p{};         // defaults to = 0.0
         double cpu_c{};         // defaults to = 0.0
 		char state = '0';
-        uint64_t p_nice{};      // defaults to 0
+        int64_t p_nice{};      // defaults to 0
         uint64_t ppid{};        // defaults to 0
         uint64_t cpu_s{};       // defaults to 0
         uint64_t cpu_t{};       // defaults to 0
diff --git a/src/linux/btop_collect.cpp b/src/linux/btop_collect.cpp
index fd90588..cec781d 100644
--- a/src/linux/btop_collect.cpp
+++ b/src/linux/btop_collect.cpp
@@ -1884,7 +1884,7 @@ namespace Proc {
 								next_x = 19;
 								continue;
 							case 19: //? Nice value
-								new_proc.p_nice = stoull(short_str);
+								new_proc.p_nice = stoll(short_str);
 								continue;
 							case 20: //? Number of threads
 								new_proc.threads = stoull(short_str);