diff --git a/CRT.c b/CRT.c
index aa115abe..56e9923f 100644
--- a/CRT.c
+++ b/CRT.c
@@ -652,8 +652,7 @@ int CRT_scrollWheelVAmount = 10;
 ColorScheme CRT_colorScheme = COLORSCHEME_DEFAULT;
 
 ATTR_NORETURN
-static void CRT_handleSIGTERM(int sgn) {
-   (void) sgn;
+static void CRT_handleSIGTERM(ATTR_UNUSED int sgn) {
    CRT_done();
    _exit(0);
 }
diff --git a/Meter.c b/Meter.c
index 3173a47c..d7a17552 100644
--- a/Meter.c
+++ b/Meter.c
@@ -378,9 +378,7 @@ static void LEDMeterMode_drawDigit(int x, int y, int n) {
       mvaddstr(y+i, x, LEDMeterMode_digits[i * 10 + n]);
 }
 
-static void LEDMeterMode_draw(Meter* this, int x, int y, int w) {
-   (void) w;
-
+static void LEDMeterMode_draw(Meter* this, int x, int y, ATTR_UNUSED int w) {
 #ifdef HAVE_LIBNCURSESW
    if (CRT_utf8)
       LEDMeterMode_digits = LEDMeterMode_digitsUtf8;
diff --git a/Process.c b/Process.c
index 3fbcb634..58bd6a90 100644
--- a/Process.c
+++ b/Process.c
@@ -316,12 +316,12 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
       if (field == PERCENT_NORM_CPU) {
          cpuPercentage /= this->processList->cpuCount;
       }
-      if (cpuPercentage > 999.9f) {
+      if (cpuPercentage > 999.9F) {
          xSnprintf(buffer, n, "%4u ", (unsigned int)cpuPercentage);
-      } else if (cpuPercentage > 99.9f) {
+      } else if (cpuPercentage > 99.9F) {
          xSnprintf(buffer, n, "%3u. ", (unsigned int)cpuPercentage);
       } else {
-         if (cpuPercentage < 0.05f)
+         if (cpuPercentage < 0.05F)
             attr = CRT_colors[PROCESS_SHADOW];
 
          xSnprintf(buffer, n, "%4.1f ", cpuPercentage);
@@ -329,10 +329,10 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
       break;
    }
    case PERCENT_MEM:
-      if (this->percent_mem > 99.9f) {
+      if (this->percent_mem > 99.9F) {
          xSnprintf(buffer, n, "100. ");
       } else {
-         if (this->percent_mem < 0.05f)
+         if (this->percent_mem < 0.05F)
             attr = CRT_colors[PROCESS_SHADOW];
 
          xSnprintf(buffer, n, "%4.1f ", this->percent_mem);
diff --git a/TraceScreen.c b/TraceScreen.c
index c21e4802..50c0eca1 100644
--- a/TraceScreen.c
+++ b/TraceScreen.c
@@ -93,8 +93,7 @@ bool TraceScreen_forkTracer(TraceScreen* this) {
 
       // Should never reach here, unless execlp fails ...
       const char* message = "Could not execute 'strace'. Please make sure it is available in your $PATH.";
-      ssize_t written = write(STDERR_FILENO, message, strlen(message));
-      (void) written;
+      (void)! write(STDERR_FILENO, message, strlen(message));
 
       exit(127);
    }
diff --git a/linux/LinuxProcessList.c b/linux/LinuxProcessList.c
index 69e5b75f..89a39732 100644
--- a/linux/LinuxProcessList.c
+++ b/linux/LinuxProcessList.c
@@ -1546,7 +1546,7 @@ static inline void LinuxProcessList_scanMemoryInfo(ProcessList* this) {
          if (String_startsWith(buffer, label)) {                             \
             memory_t parsed_;                                                \
             if (sscanf(buffer + strlen(label), "%llu kB", &parsed_) == 1) {  \
-               variable = parsed_;                                           \
+               (variable) = parsed_;                                         \
             }                                                                \
             break;                                                           \
          }